libavcodec/crystalhd.c
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00001 /*
00002  * - CrystalHD decoder module -
00003  *
00004  * Copyright(C) 2010,2011 Philip Langdale <ffmpeg.philipl@overt.org>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 /*
00024  * - Principles of Operation -
00025  *
00026  * The CrystalHD decoder operates at the bitstream level - which is an even
00027  * higher level than the decoding hardware you typically see in modern GPUs.
00028  * This means it has a very simple interface, in principle. You feed demuxed
00029  * packets in one end and get decoded picture (fields/frames) out the other.
00030  *
00031  * Of course, nothing is ever that simple. Due, at the very least, to b-frame
00032  * dependencies in the supported formats, the hardware has a delay between
00033  * when a packet goes in, and when a picture comes out. Furthermore, this delay
00034  * is not just a function of time, but also one of the dependency on additional
00035  * frames being fed into the decoder to satisfy the b-frame dependencies.
00036  *
00037  * As such, a pipeline will build up that is roughly equivalent to the required
00038  * DPB for the file being played. If that was all it took, things would still
00039  * be simple - so, of course, it isn't.
00040  *
00041  * The hardware has a way of indicating that a picture is ready to be copied out,
00042  * but this is unreliable - and sometimes the attempt will still fail so, based
00043  * on testing, the code will wait until 3 pictures are ready before starting
00044  * to copy out - and this has the effect of extending the pipeline.
00045  *
00046  * Finally, while it is tempting to say that once the decoder starts outputing
00047  * frames, the software should never fail to return a frame from a decode(),
00048  * this is a hard assertion to make, because the stream may switch between
00049  * differently encoded content (number of b-frames, interlacing, etc) which
00050  * might require a longer pipeline than before. If that happened, you could
00051  * deadlock trying to retrieve a frame that can't be decoded without feeding
00052  * in additional packets.
00053  *
00054  * As such, the code will return in the event that a picture cannot be copied
00055  * out, leading to an increase in the length of the pipeline. This in turn,
00056  * means we have to be sensitive to the time it takes to decode a picture;
00057  * We do not want to give up just because the hardware needed a little more
00058  * time to prepare the picture! For this reason, there are delays included
00059  * in the decode() path that ensure that, under normal conditions, the hardware
00060  * will only fail to return a frame if it really needs additional packets to
00061  * complete the decoding.
00062  *
00063  * Finally, to be explicit, we do not want the pipeline to grow without bound
00064  * for two reasons: 1) The hardware can only buffer a finite number of packets,
00065  * and 2) The client application may not be able to cope with arbitrarily long
00066  * delays in the video path relative to the audio path. For example. MPlayer
00067  * can only handle a 20 picture delay (although this is arbitrary, and needs
00068  * to be extended to fully support the CrystalHD where the delay could be up
00069  * to 32 pictures - consider PAFF H.264 content with 16 b-frames).
00070  */
00071 
00072 /*****************************************************************************
00073  * Includes
00074  ****************************************************************************/
00075 
00076 #define _XOPEN_SOURCE 600
00077 #include <inttypes.h>
00078 #include <stdio.h>
00079 #include <stdlib.h>
00080 #include <unistd.h>
00081 
00082 #include <libcrystalhd/bc_dts_types.h>
00083 #include <libcrystalhd/bc_dts_defs.h>
00084 #include <libcrystalhd/libcrystalhd_if.h>
00085 
00086 #include "avcodec.h"
00087 #include "h264.h"
00088 #include "libavutil/imgutils.h"
00089 #include "libavutil/intreadwrite.h"
00090 #include "libavutil/opt.h"
00091 
00093 #define OUTPUT_PROC_TIMEOUT 50
00094 
00095 #define TIMESTAMP_UNIT 100000
00096 
00097 #define BASE_WAIT 10000
00098 
00099 #define WAIT_UNIT 1000
00100 
00101 
00102 /*****************************************************************************
00103  * Module private data
00104  ****************************************************************************/
00105 
00106 typedef enum {
00107     RET_ERROR           = -1,
00108     RET_OK              = 0,
00109     RET_COPY_AGAIN      = 1,
00110     RET_SKIP_NEXT_COPY  = 2,
00111     RET_COPY_NEXT_FIELD = 3,
00112 } CopyRet;
00113 
00114 typedef struct OpaqueList {
00115     struct OpaqueList *next;
00116     uint64_t fake_timestamp;
00117     uint64_t reordered_opaque;
00118     uint8_t pic_type;
00119 } OpaqueList;
00120 
00121 typedef struct {
00122     AVClass *av_class;
00123     AVCodecContext *avctx;
00124     AVFrame pic;
00125     HANDLE dev;
00126 
00127     uint8_t *orig_extradata;
00128     uint32_t orig_extradata_size;
00129 
00130     AVBitStreamFilterContext *bsfc;
00131     AVCodecParserContext *parser;
00132 
00133     uint8_t is_70012;
00134     uint8_t *sps_pps_buf;
00135     uint32_t sps_pps_size;
00136     uint8_t is_nal;
00137     uint8_t output_ready;
00138     uint8_t need_second_field;
00139     uint8_t skip_next_output;
00140     uint64_t decode_wait;
00141 
00142     uint64_t last_picture;
00143 
00144     OpaqueList *head;
00145     OpaqueList *tail;
00146 
00147     /* Options */
00148     uint32_t sWidth;
00149     uint8_t bframe_bug;
00150 } CHDContext;
00151 
00152 static const AVOption options[] = {
00153     { "crystalhd_downscale_width",
00154       "Turn on downscaling to the specified width",
00155       offsetof(CHDContext, sWidth),
00156       AV_OPT_TYPE_INT, 0, 0, UINT32_MAX,
00157       AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM, },
00158     { NULL, },
00159 };
00160 
00161 
00162 /*****************************************************************************
00163  * Helper functions
00164  ****************************************************************************/
00165 
00166 static inline BC_MEDIA_SUBTYPE id2subtype(CHDContext *priv, enum CodecID id)
00167 {
00168     switch (id) {
00169     case CODEC_ID_MPEG4:
00170         return BC_MSUBTYPE_DIVX;
00171     case CODEC_ID_MSMPEG4V3:
00172         return BC_MSUBTYPE_DIVX311;
00173     case CODEC_ID_MPEG2VIDEO:
00174         return BC_MSUBTYPE_MPEG2VIDEO;
00175     case CODEC_ID_VC1:
00176         return BC_MSUBTYPE_VC1;
00177     case CODEC_ID_WMV3:
00178         return BC_MSUBTYPE_WMV3;
00179     case CODEC_ID_H264:
00180         return priv->is_nal ? BC_MSUBTYPE_AVC1 : BC_MSUBTYPE_H264;
00181     default:
00182         return BC_MSUBTYPE_INVALID;
00183     }
00184 }
00185 
00186 static inline void print_frame_info(CHDContext *priv, BC_DTS_PROC_OUT *output)
00187 {
00188     av_log(priv->avctx, AV_LOG_VERBOSE, "\tYBuffSz: %u\n", output->YbuffSz);
00189     av_log(priv->avctx, AV_LOG_VERBOSE, "\tYBuffDoneSz: %u\n",
00190            output->YBuffDoneSz);
00191     av_log(priv->avctx, AV_LOG_VERBOSE, "\tUVBuffDoneSz: %u\n",
00192            output->UVBuffDoneSz);
00193     av_log(priv->avctx, AV_LOG_VERBOSE, "\tTimestamp: %"PRIu64"\n",
00194            output->PicInfo.timeStamp);
00195     av_log(priv->avctx, AV_LOG_VERBOSE, "\tPicture Number: %u\n",
00196            output->PicInfo.picture_number);
00197     av_log(priv->avctx, AV_LOG_VERBOSE, "\tWidth: %u\n",
00198            output->PicInfo.width);
00199     av_log(priv->avctx, AV_LOG_VERBOSE, "\tHeight: %u\n",
00200            output->PicInfo.height);
00201     av_log(priv->avctx, AV_LOG_VERBOSE, "\tChroma: 0x%03x\n",
00202            output->PicInfo.chroma_format);
00203     av_log(priv->avctx, AV_LOG_VERBOSE, "\tPulldown: %u\n",
00204            output->PicInfo.pulldown);
00205     av_log(priv->avctx, AV_LOG_VERBOSE, "\tFlags: 0x%08x\n",
00206            output->PicInfo.flags);
00207     av_log(priv->avctx, AV_LOG_VERBOSE, "\tFrame Rate/Res: %u\n",
00208            output->PicInfo.frame_rate);
00209     av_log(priv->avctx, AV_LOG_VERBOSE, "\tAspect Ratio: %u\n",
00210            output->PicInfo.aspect_ratio);
00211     av_log(priv->avctx, AV_LOG_VERBOSE, "\tColor Primaries: %u\n",
00212            output->PicInfo.colour_primaries);
00213     av_log(priv->avctx, AV_LOG_VERBOSE, "\tMetaData: %u\n",
00214            output->PicInfo.picture_meta_payload);
00215     av_log(priv->avctx, AV_LOG_VERBOSE, "\tSession Number: %u\n",
00216            output->PicInfo.sess_num);
00217     av_log(priv->avctx, AV_LOG_VERBOSE, "\tycom: %u\n",
00218            output->PicInfo.ycom);
00219     av_log(priv->avctx, AV_LOG_VERBOSE, "\tCustom Aspect: %u\n",
00220            output->PicInfo.custom_aspect_ratio_width_height);
00221     av_log(priv->avctx, AV_LOG_VERBOSE, "\tFrames to Drop: %u\n",
00222            output->PicInfo.n_drop);
00223     av_log(priv->avctx, AV_LOG_VERBOSE, "\tH264 Valid Fields: 0x%08x\n",
00224            output->PicInfo.other.h264.valid);
00225 }
00226 
00227 
00228 /*****************************************************************************
00229  * OpaqueList functions
00230  ****************************************************************************/
00231 
00232 static uint64_t opaque_list_push(CHDContext *priv, uint64_t reordered_opaque,
00233                                  uint8_t pic_type)
00234 {
00235     OpaqueList *newNode = av_mallocz(sizeof (OpaqueList));
00236     if (!newNode) {
00237         av_log(priv->avctx, AV_LOG_ERROR,
00238                "Unable to allocate new node in OpaqueList.\n");
00239         return 0;
00240     }
00241     if (!priv->head) {
00242         newNode->fake_timestamp = TIMESTAMP_UNIT;
00243         priv->head              = newNode;
00244     } else {
00245         newNode->fake_timestamp = priv->tail->fake_timestamp + TIMESTAMP_UNIT;
00246         priv->tail->next        = newNode;
00247     }
00248     priv->tail = newNode;
00249     newNode->reordered_opaque = reordered_opaque;
00250     newNode->pic_type = pic_type;
00251 
00252     return newNode->fake_timestamp;
00253 }
00254 
00255 /*
00256  * The OpaqueList is built in decode order, while elements will be removed
00257  * in presentation order. If frames are reordered, this means we must be
00258  * able to remove elements that are not the first element.
00259  *
00260  * Returned node must be freed by caller.
00261  */
00262 static OpaqueList *opaque_list_pop(CHDContext *priv, uint64_t fake_timestamp)
00263 {
00264     OpaqueList *node = priv->head;
00265 
00266     if (!priv->head) {
00267         av_log(priv->avctx, AV_LOG_ERROR,
00268                "CrystalHD: Attempted to query non-existent timestamps.\n");
00269         return NULL;
00270     }
00271 
00272     /*
00273      * The first element is special-cased because we have to manipulate
00274      * the head pointer rather than the previous element in the list.
00275      */
00276     if (priv->head->fake_timestamp == fake_timestamp) {
00277         priv->head = node->next;
00278 
00279         if (!priv->head->next)
00280             priv->tail = priv->head;
00281 
00282         node->next = NULL;
00283         return node;
00284     }
00285 
00286     /*
00287      * The list is processed at arm's length so that we have the
00288      * previous element available to rewrite its next pointer.
00289      */
00290     while (node->next) {
00291         OpaqueList *current = node->next;
00292         if (current->fake_timestamp == fake_timestamp) {
00293             node->next = current->next;
00294 
00295             if (!node->next)
00296                priv->tail = node;
00297 
00298             current->next = NULL;
00299             return current;
00300         } else {
00301             node = current;
00302         }
00303     }
00304 
00305     av_log(priv->avctx, AV_LOG_VERBOSE,
00306            "CrystalHD: Couldn't match fake_timestamp.\n");
00307     return NULL;
00308 }
00309 
00310 
00311 /*****************************************************************************
00312  * Video decoder API function definitions
00313  ****************************************************************************/
00314 
00315 static void flush(AVCodecContext *avctx)
00316 {
00317     CHDContext *priv = avctx->priv_data;
00318 
00319     avctx->has_b_frames     = 0;
00320     priv->last_picture      = -1;
00321     priv->output_ready      = 0;
00322     priv->need_second_field = 0;
00323     priv->skip_next_output  = 0;
00324     priv->decode_wait       = BASE_WAIT;
00325 
00326     if (priv->pic.data[0])
00327         avctx->release_buffer(avctx, &priv->pic);
00328 
00329     /* Flush mode 4 flushes all software and hardware buffers. */
00330     DtsFlushInput(priv->dev, 4);
00331 }
00332 
00333 
00334 static av_cold int uninit(AVCodecContext *avctx)
00335 {
00336     CHDContext *priv = avctx->priv_data;
00337     HANDLE device;
00338 
00339     device = priv->dev;
00340     DtsStopDecoder(device);
00341     DtsCloseDecoder(device);
00342     DtsDeviceClose(device);
00343 
00344     /*
00345      * Restore original extradata, so that if the decoder is
00346      * reinitialised, the bitstream detection and filtering
00347      * will work as expected.
00348      */
00349     if (priv->orig_extradata) {
00350         av_free(avctx->extradata);
00351         avctx->extradata = priv->orig_extradata;
00352         avctx->extradata_size = priv->orig_extradata_size;
00353         priv->orig_extradata = NULL;
00354         priv->orig_extradata_size = 0;
00355     }
00356 
00357     av_parser_close(priv->parser);
00358     if (priv->bsfc) {
00359         av_bitstream_filter_close(priv->bsfc);
00360     }
00361 
00362     av_free(priv->sps_pps_buf);
00363 
00364     if (priv->pic.data[0])
00365         avctx->release_buffer(avctx, &priv->pic);
00366 
00367     if (priv->head) {
00368        OpaqueList *node = priv->head;
00369        while (node) {
00370           OpaqueList *next = node->next;
00371           av_free(node);
00372           node = next;
00373        }
00374     }
00375 
00376     return 0;
00377 }
00378 
00379 
00380 static av_cold int init(AVCodecContext *avctx)
00381 {
00382     CHDContext* priv;
00383     BC_STATUS ret;
00384     BC_INFO_CRYSTAL version;
00385     BC_INPUT_FORMAT format = {
00386         .FGTEnable   = FALSE,
00387         .Progressive = TRUE,
00388         .OptFlags    = 0x80000000 | vdecFrameRate59_94 | 0x40,
00389         .width       = avctx->width,
00390         .height      = avctx->height,
00391     };
00392 
00393     BC_MEDIA_SUBTYPE subtype;
00394 
00395     uint32_t mode = DTS_PLAYBACK_MODE |
00396                     DTS_LOAD_FILE_PLAY_FW |
00397                     DTS_SKIP_TX_CHK_CPB |
00398                     DTS_PLAYBACK_DROP_RPT_MODE |
00399                     DTS_SINGLE_THREADED_MODE |
00400                     DTS_DFLT_RESOLUTION(vdecRESOLUTION_1080p23_976);
00401 
00402     av_log(avctx, AV_LOG_VERBOSE, "CrystalHD Init for %s\n",
00403            avctx->codec->name);
00404 
00405     avctx->pix_fmt = PIX_FMT_YUYV422;
00406 
00407     /* Initialize the library */
00408     priv               = avctx->priv_data;
00409     priv->avctx        = avctx;
00410     priv->is_nal       = avctx->extradata_size > 0 && *(avctx->extradata) == 1;
00411     priv->last_picture = -1;
00412     priv->decode_wait  = BASE_WAIT;
00413 
00414     subtype = id2subtype(priv, avctx->codec->id);
00415     switch (subtype) {
00416     case BC_MSUBTYPE_AVC1:
00417         {
00418             uint8_t *dummy_p;
00419             int dummy_int;
00420 
00421             /* Back up the extradata so it can be restored at close time. */
00422             priv->orig_extradata = av_malloc(avctx->extradata_size);
00423             if (!priv->orig_extradata) {
00424                 av_log(avctx, AV_LOG_ERROR,
00425                        "Failed to allocate copy of extradata\n");
00426                 return AVERROR(ENOMEM);
00427             }
00428             priv->orig_extradata_size = avctx->extradata_size;
00429             memcpy(priv->orig_extradata, avctx->extradata, avctx->extradata_size);
00430 
00431             priv->bsfc = av_bitstream_filter_init("h264_mp4toannexb");
00432             if (!priv->bsfc) {
00433                 av_log(avctx, AV_LOG_ERROR,
00434                        "Cannot open the h264_mp4toannexb BSF!\n");
00435                 return AVERROR_BSF_NOT_FOUND;
00436             }
00437             av_bitstream_filter_filter(priv->bsfc, avctx, NULL, &dummy_p,
00438                                        &dummy_int, NULL, 0, 0);
00439         }
00440         subtype = BC_MSUBTYPE_H264;
00441         // Fall-through
00442     case BC_MSUBTYPE_H264:
00443         format.startCodeSz = 4;
00444         // Fall-through
00445     case BC_MSUBTYPE_VC1:
00446     case BC_MSUBTYPE_WVC1:
00447     case BC_MSUBTYPE_WMV3:
00448     case BC_MSUBTYPE_WMVA:
00449     case BC_MSUBTYPE_MPEG2VIDEO:
00450     case BC_MSUBTYPE_DIVX:
00451     case BC_MSUBTYPE_DIVX311:
00452         format.pMetaData  = avctx->extradata;
00453         format.metaDataSz = avctx->extradata_size;
00454         break;
00455     default:
00456         av_log(avctx, AV_LOG_ERROR, "CrystalHD: Unknown codec name\n");
00457         return AVERROR(EINVAL);
00458     }
00459     format.mSubtype = subtype;
00460 
00461     if (priv->sWidth) {
00462         format.bEnableScaling = 1;
00463         format.ScalingParams.sWidth = priv->sWidth;
00464     }
00465 
00466     /* Get a decoder instance */
00467     av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: starting up\n");
00468     // Initialize the Link and Decoder devices
00469     ret = DtsDeviceOpen(&priv->dev, mode);
00470     if (ret != BC_STS_SUCCESS) {
00471         av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: DtsDeviceOpen failed\n");
00472         goto fail;
00473     }
00474 
00475     ret = DtsCrystalHDVersion(priv->dev, &version);
00476     if (ret != BC_STS_SUCCESS) {
00477         av_log(avctx, AV_LOG_VERBOSE,
00478                "CrystalHD: DtsCrystalHDVersion failed\n");
00479         goto fail;
00480     }
00481     priv->is_70012 = version.device == 0;
00482 
00483     if (priv->is_70012 &&
00484         (subtype == BC_MSUBTYPE_DIVX || subtype == BC_MSUBTYPE_DIVX311)) {
00485         av_log(avctx, AV_LOG_VERBOSE,
00486                "CrystalHD: BCM70012 doesn't support MPEG4-ASP/DivX/Xvid\n");
00487         goto fail;
00488     }
00489 
00490     ret = DtsSetInputFormat(priv->dev, &format);
00491     if (ret != BC_STS_SUCCESS) {
00492         av_log(avctx, AV_LOG_ERROR, "CrystalHD: SetInputFormat failed\n");
00493         goto fail;
00494     }
00495 
00496     ret = DtsOpenDecoder(priv->dev, BC_STREAM_TYPE_ES);
00497     if (ret != BC_STS_SUCCESS) {
00498         av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsOpenDecoder failed\n");
00499         goto fail;
00500     }
00501 
00502     ret = DtsSetColorSpace(priv->dev, OUTPUT_MODE422_YUY2);
00503     if (ret != BC_STS_SUCCESS) {
00504         av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsSetColorSpace failed\n");
00505         goto fail;
00506     }
00507     ret = DtsStartDecoder(priv->dev);
00508     if (ret != BC_STS_SUCCESS) {
00509         av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsStartDecoder failed\n");
00510         goto fail;
00511     }
00512     ret = DtsStartCapture(priv->dev);
00513     if (ret != BC_STS_SUCCESS) {
00514         av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsStartCapture failed\n");
00515         goto fail;
00516     }
00517 
00518     if (avctx->codec->id == CODEC_ID_H264) {
00519         priv->parser = av_parser_init(avctx->codec->id);
00520         if (!priv->parser)
00521             av_log(avctx, AV_LOG_WARNING,
00522                    "Cannot open the h.264 parser! Interlaced h.264 content "
00523                    "will not be detected reliably.\n");
00524         priv->parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
00525     }
00526     av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Init complete.\n");
00527 
00528     return 0;
00529 
00530  fail:
00531     uninit(avctx);
00532     return -1;
00533 }
00534 
00535 
00536 static inline CopyRet copy_frame(AVCodecContext *avctx,
00537                                  BC_DTS_PROC_OUT *output,
00538                                  void *data, int *data_size)
00539 {
00540     BC_STATUS ret;
00541     BC_DTS_STATUS decoder_status = { 0, };
00542     uint8_t trust_interlaced;
00543     uint8_t interlaced;
00544 
00545     CHDContext *priv = avctx->priv_data;
00546     int64_t pkt_pts  = AV_NOPTS_VALUE;
00547     uint8_t pic_type = 0;
00548 
00549     uint8_t bottom_field = (output->PicInfo.flags & VDEC_FLAG_BOTTOMFIELD) ==
00550                            VDEC_FLAG_BOTTOMFIELD;
00551     uint8_t bottom_first = !!(output->PicInfo.flags & VDEC_FLAG_BOTTOM_FIRST);
00552 
00553     int width    = output->PicInfo.width;
00554     int height   = output->PicInfo.height;
00555     int bwidth;
00556     uint8_t *src = output->Ybuff;
00557     int sStride;
00558     uint8_t *dst;
00559     int dStride;
00560 
00561     if (output->PicInfo.timeStamp != 0) {
00562         OpaqueList *node = opaque_list_pop(priv, output->PicInfo.timeStamp);
00563         if (node) {
00564             pkt_pts = node->reordered_opaque;
00565             pic_type = node->pic_type;
00566             av_free(node);
00567         } else {
00568             /*
00569              * We will encounter a situation where a timestamp cannot be
00570              * popped if a second field is being returned. In this case,
00571              * each field has the same timestamp and the first one will
00572              * cause it to be popped. To keep subsequent calculations
00573              * simple, pic_type should be set a FIELD value - doesn't
00574              * matter which, but I chose BOTTOM.
00575              */
00576             pic_type = PICT_BOTTOM_FIELD;
00577         }
00578         av_log(avctx, AV_LOG_VERBOSE, "output \"pts\": %"PRIu64"\n",
00579                output->PicInfo.timeStamp);
00580         av_log(avctx, AV_LOG_VERBOSE, "output picture type %d\n",
00581                pic_type);
00582     }
00583 
00584     ret = DtsGetDriverStatus(priv->dev, &decoder_status);
00585     if (ret != BC_STS_SUCCESS) {
00586         av_log(avctx, AV_LOG_ERROR,
00587                "CrystalHD: GetDriverStatus failed: %u\n", ret);
00588        return RET_ERROR;
00589     }
00590 
00591     /*
00592      * For most content, we can trust the interlaced flag returned
00593      * by the hardware, but sometimes we can't. These are the
00594      * conditions under which we can trust the flag:
00595      *
00596      * 1) It's not h.264 content
00597      * 2) The UNKNOWN_SRC flag is not set
00598      * 3) We know we're expecting a second field
00599      * 4) The hardware reports this picture and the next picture
00600      *    have the same picture number.
00601      *
00602      * Note that there can still be interlaced content that will
00603      * fail this check, if the hardware hasn't decoded the next
00604      * picture or if there is a corruption in the stream. (In either
00605      * case a 0 will be returned for the next picture number)
00606      */
00607     trust_interlaced = avctx->codec->id != CODEC_ID_H264 ||
00608                        !(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) ||
00609                        priv->need_second_field ||
00610                        (decoder_status.picNumFlags & ~0x40000000) ==
00611                        output->PicInfo.picture_number;
00612 
00613     /*
00614      * If we got a false negative for trust_interlaced on the first field,
00615      * we will realise our mistake here when we see that the picture number is that
00616      * of the previous picture. We cannot recover the frame and should discard the
00617      * second field to keep the correct number of output frames.
00618      */
00619     if (output->PicInfo.picture_number == priv->last_picture && !priv->need_second_field) {
00620         av_log(avctx, AV_LOG_WARNING,
00621                "Incorrectly guessed progressive frame. Discarding second field\n");
00622         /* Returning without providing a picture. */
00623         return RET_OK;
00624     }
00625 
00626     interlaced = (output->PicInfo.flags & VDEC_FLAG_INTERLACED_SRC) &&
00627                  trust_interlaced;
00628 
00629     if (!trust_interlaced && (decoder_status.picNumFlags & ~0x40000000) == 0) {
00630         av_log(avctx, AV_LOG_VERBOSE,
00631                "Next picture number unknown. Assuming progressive frame.\n");
00632     }
00633 
00634     av_log(avctx, AV_LOG_VERBOSE, "Interlaced state: %d | trust_interlaced %d\n",
00635            interlaced, trust_interlaced);
00636 
00637     if (priv->pic.data[0] && !priv->need_second_field)
00638         avctx->release_buffer(avctx, &priv->pic);
00639 
00640     priv->need_second_field = interlaced && !priv->need_second_field;
00641 
00642     priv->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
00643                              FF_BUFFER_HINTS_REUSABLE;
00644     if (!priv->pic.data[0]) {
00645         if (avctx->get_buffer(avctx, &priv->pic) < 0) {
00646             av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00647             return RET_ERROR;
00648         }
00649     }
00650 
00651     bwidth = av_image_get_linesize(avctx->pix_fmt, width, 0);
00652     if (priv->is_70012) {
00653         int pStride;
00654 
00655         if (width <= 720)
00656             pStride = 720;
00657         else if (width <= 1280)
00658             pStride = 1280;
00659         else if (width <= 1080)
00660             pStride = 1080;
00661         sStride = av_image_get_linesize(avctx->pix_fmt, pStride, 0);
00662     } else {
00663         sStride = bwidth;
00664     }
00665 
00666     dStride = priv->pic.linesize[0];
00667     dst     = priv->pic.data[0];
00668 
00669     av_log(priv->avctx, AV_LOG_VERBOSE, "CrystalHD: Copying out frame\n");
00670 
00671     if (interlaced) {
00672         int dY = 0;
00673         int sY = 0;
00674 
00675         height /= 2;
00676         if (bottom_field) {
00677             av_log(priv->avctx, AV_LOG_VERBOSE, "Interlaced: bottom field\n");
00678             dY = 1;
00679         } else {
00680             av_log(priv->avctx, AV_LOG_VERBOSE, "Interlaced: top field\n");
00681             dY = 0;
00682         }
00683 
00684         for (sY = 0; sY < height; dY++, sY++) {
00685             memcpy(&(dst[dY * dStride]), &(src[sY * sStride]), bwidth);
00686             dY++;
00687         }
00688     } else {
00689         av_image_copy_plane(dst, dStride, src, sStride, bwidth, height);
00690     }
00691 
00692     priv->pic.interlaced_frame = interlaced;
00693     if (interlaced)
00694         priv->pic.top_field_first = !bottom_first;
00695 
00696     priv->pic.pkt_pts = pkt_pts;
00697 
00698     if (!priv->need_second_field) {
00699         *data_size       = sizeof(AVFrame);
00700         *(AVFrame *)data = priv->pic;
00701     }
00702 
00703     /*
00704      * Two types of PAFF content have been observed. One form causes the
00705      * hardware to return a field pair and the other individual fields,
00706      * even though the input is always individual fields. We must skip
00707      * copying on the next decode() call to maintain pipeline length in
00708      * the first case.
00709      */
00710     if (!interlaced && (output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) &&
00711         (pic_type == PICT_TOP_FIELD || pic_type == PICT_BOTTOM_FIELD)) {
00712         av_log(priv->avctx, AV_LOG_VERBOSE, "Fieldpair from two packets.\n");
00713         return RET_SKIP_NEXT_COPY;
00714     }
00715 
00716     /*
00717      * Testing has shown that in all cases where we don't want to return the
00718      * full frame immediately, VDEC_FLAG_UNKNOWN_SRC is set.
00719      */
00720     return priv->need_second_field &&
00721            !(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) ?
00722            RET_COPY_NEXT_FIELD : RET_OK;
00723 }
00724 
00725 
00726 static inline CopyRet receive_frame(AVCodecContext *avctx,
00727                                     void *data, int *data_size)
00728 {
00729     BC_STATUS ret;
00730     BC_DTS_PROC_OUT output = {
00731         .PicInfo.width  = avctx->width,
00732         .PicInfo.height = avctx->height,
00733     };
00734     CHDContext *priv = avctx->priv_data;
00735     HANDLE dev       = priv->dev;
00736 
00737     *data_size = 0;
00738 
00739     // Request decoded data from the driver
00740     ret = DtsProcOutputNoCopy(dev, OUTPUT_PROC_TIMEOUT, &output);
00741     if (ret == BC_STS_FMT_CHANGE) {
00742         av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Initial format change\n");
00743         avctx->width  = output.PicInfo.width;
00744         avctx->height = output.PicInfo.height;
00745         return RET_COPY_AGAIN;
00746     } else if (ret == BC_STS_SUCCESS) {
00747         int copy_ret = -1;
00748         if (output.PoutFlags & BC_POUT_FLAGS_PIB_VALID) {
00749             if (priv->last_picture == -1) {
00750                 /*
00751                  * Init to one less, so that the incrementing code doesn't
00752                  * need to be special-cased.
00753                  */
00754                 priv->last_picture = output.PicInfo.picture_number - 1;
00755             }
00756 
00757             if (avctx->codec->id == CODEC_ID_MPEG4 &&
00758                 output.PicInfo.timeStamp == 0 && priv->bframe_bug) {
00759                 av_log(avctx, AV_LOG_VERBOSE,
00760                        "CrystalHD: Not returning packed frame twice.\n");
00761                 priv->last_picture++;
00762                 DtsReleaseOutputBuffs(dev, NULL, FALSE);
00763                 return RET_COPY_AGAIN;
00764             }
00765 
00766             print_frame_info(priv, &output);
00767 
00768             if (priv->last_picture + 1 < output.PicInfo.picture_number) {
00769                 av_log(avctx, AV_LOG_WARNING,
00770                        "CrystalHD: Picture Number discontinuity\n");
00771                 /*
00772                  * Have we lost frames? If so, we need to shrink the
00773                  * pipeline length appropriately.
00774                  *
00775                  * XXX: I have no idea what the semantics of this situation
00776                  * are so I don't even know if we've lost frames or which
00777                  * ones.
00778                  *
00779                  * In any case, only warn the first time.
00780                  */
00781                priv->last_picture = output.PicInfo.picture_number - 1;
00782             }
00783 
00784             copy_ret = copy_frame(avctx, &output, data, data_size);
00785             if (*data_size > 0) {
00786                 avctx->has_b_frames--;
00787                 priv->last_picture++;
00788                 av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Pipeline length: %u\n",
00789                        avctx->has_b_frames);
00790             }
00791         } else {
00792             /*
00793              * An invalid frame has been consumed.
00794              */
00795             av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput succeeded with "
00796                                         "invalid PIB\n");
00797             avctx->has_b_frames--;
00798             copy_ret = RET_OK;
00799         }
00800         DtsReleaseOutputBuffs(dev, NULL, FALSE);
00801 
00802         return copy_ret;
00803     } else if (ret == BC_STS_BUSY) {
00804         return RET_COPY_AGAIN;
00805     } else {
00806         av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput failed %d\n", ret);
00807         return RET_ERROR;
00808     }
00809 }
00810 
00811 
00812 static int decode(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
00813 {
00814     BC_STATUS ret;
00815     BC_DTS_STATUS decoder_status = { 0, };
00816     CopyRet rec_ret;
00817     CHDContext *priv   = avctx->priv_data;
00818     HANDLE dev         = priv->dev;
00819     uint8_t *in_data   = avpkt->data;
00820     int len            = avpkt->size;
00821     int free_data      = 0;
00822     uint8_t pic_type   = 0;
00823 
00824     av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: decode_frame\n");
00825 
00826     if (avpkt->size == 7 && !priv->bframe_bug) {
00827         /*
00828          * The use of a drop frame triggers the bug
00829          */
00830         av_log(avctx, AV_LOG_INFO,
00831                "CrystalHD: Enabling work-around for packed b-frame bug\n");
00832         priv->bframe_bug = 1;
00833     } else if (avpkt->size == 8 && priv->bframe_bug) {
00834         /*
00835          * Delay frames don't trigger the bug
00836          */
00837         av_log(avctx, AV_LOG_INFO,
00838                "CrystalHD: Disabling work-around for packed b-frame bug\n");
00839         priv->bframe_bug = 0;
00840     }
00841 
00842     if (len) {
00843         int32_t tx_free = (int32_t)DtsTxFreeSize(dev);
00844 
00845         if (priv->parser) {
00846             int ret = 0;
00847 
00848             if (priv->bsfc) {
00849                 ret = av_bitstream_filter_filter(priv->bsfc, avctx, NULL,
00850                                                  &in_data, &len,
00851                                                  avpkt->data, len, 0);
00852             }
00853             free_data = ret > 0;
00854 
00855             if (ret >= 0) {
00856                 uint8_t *pout;
00857                 int psize;
00858                 int index;
00859                 H264Context *h = priv->parser->priv_data;
00860 
00861                 index = av_parser_parse2(priv->parser, avctx, &pout, &psize,
00862                                          in_data, len, avctx->pkt->pts,
00863                                          avctx->pkt->dts, 0);
00864                 if (index < 0) {
00865                     av_log(avctx, AV_LOG_WARNING,
00866                            "CrystalHD: Failed to parse h.264 packet to "
00867                            "detect interlacing.\n");
00868                 } else if (index != len) {
00869                     av_log(avctx, AV_LOG_WARNING,
00870                            "CrystalHD: Failed to parse h.264 packet "
00871                            "completely. Interlaced frames may be "
00872                            "incorrectly detected\n.");
00873                 } else {
00874                     av_log(avctx, AV_LOG_VERBOSE,
00875                            "CrystalHD: parser picture type %d\n",
00876                            h->s.picture_structure);
00877                     pic_type = h->s.picture_structure;
00878                 }
00879             } else {
00880                 av_log(avctx, AV_LOG_WARNING,
00881                        "CrystalHD: mp4toannexb filter failed to filter "
00882                        "packet. Interlaced frames may be incorrectly "
00883                        "detected.\n");
00884             }
00885         }
00886 
00887         if (len < tx_free - 1024) {
00888             /*
00889              * Despite being notionally opaque, either libcrystalhd or
00890              * the hardware itself will mangle pts values that are too
00891              * small or too large. The docs claim it should be in units
00892              * of 100ns. Given that we're nominally dealing with a black
00893              * box on both sides, any transform we do has no guarantee of
00894              * avoiding mangling so we need to build a mapping to values
00895              * we know will not be mangled.
00896              */
00897             uint64_t pts = opaque_list_push(priv, avctx->pkt->pts, pic_type);
00898             if (!pts) {
00899                 if (free_data) {
00900                     av_freep(&in_data);
00901                 }
00902                 return AVERROR(ENOMEM);
00903             }
00904             av_log(priv->avctx, AV_LOG_VERBOSE,
00905                    "input \"pts\": %"PRIu64"\n", pts);
00906             ret = DtsProcInput(dev, in_data, len, pts, 0);
00907             if (free_data) {
00908                 av_freep(&in_data);
00909             }
00910             if (ret == BC_STS_BUSY) {
00911                 av_log(avctx, AV_LOG_WARNING,
00912                        "CrystalHD: ProcInput returned busy\n");
00913                 usleep(BASE_WAIT);
00914                 return AVERROR(EBUSY);
00915             } else if (ret != BC_STS_SUCCESS) {
00916                 av_log(avctx, AV_LOG_ERROR,
00917                        "CrystalHD: ProcInput failed: %u\n", ret);
00918                 return -1;
00919             }
00920             avctx->has_b_frames++;
00921         } else {
00922             av_log(avctx, AV_LOG_WARNING, "CrystalHD: Input buffer full\n");
00923             len = 0; // We didn't consume any bytes.
00924         }
00925     } else {
00926         av_log(avctx, AV_LOG_INFO, "CrystalHD: No more input data\n");
00927     }
00928 
00929     if (priv->skip_next_output) {
00930         av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Skipping next output.\n");
00931         priv->skip_next_output = 0;
00932         avctx->has_b_frames--;
00933         return len;
00934     }
00935 
00936     ret = DtsGetDriverStatus(dev, &decoder_status);
00937     if (ret != BC_STS_SUCCESS) {
00938         av_log(avctx, AV_LOG_ERROR, "CrystalHD: GetDriverStatus failed\n");
00939         return -1;
00940     }
00941 
00942     /*
00943      * No frames ready. Don't try to extract.
00944      *
00945      * Empirical testing shows that ReadyListCount can be a damn lie,
00946      * and ProcOut still fails when count > 0. The same testing showed
00947      * that two more iterations were needed before ProcOutput would
00948      * succeed.
00949      */
00950     if (priv->output_ready < 2) {
00951         if (decoder_status.ReadyListCount != 0)
00952             priv->output_ready++;
00953         usleep(BASE_WAIT);
00954         av_log(avctx, AV_LOG_INFO, "CrystalHD: Filling pipeline.\n");
00955         return len;
00956     } else if (decoder_status.ReadyListCount == 0) {
00957         /*
00958          * After the pipeline is established, if we encounter a lack of frames
00959          * that probably means we're not giving the hardware enough time to
00960          * decode them, so start increasing the wait time at the end of a
00961          * decode call.
00962          */
00963         usleep(BASE_WAIT);
00964         priv->decode_wait += WAIT_UNIT;
00965         av_log(avctx, AV_LOG_INFO, "CrystalHD: No frames ready. Returning\n");
00966         return len;
00967     }
00968 
00969     do {
00970         rec_ret = receive_frame(avctx, data, data_size);
00971         if (rec_ret == RET_OK && *data_size == 0) {
00972             /*
00973              * This case is for when the encoded fields are stored
00974              * separately and we get a separate avpkt for each one. To keep
00975              * the pipeline stable, we should return nothing and wait for
00976              * the next time round to grab the second field.
00977              * H.264 PAFF is an example of this.
00978              */
00979             av_log(avctx, AV_LOG_VERBOSE, "Returning after first field.\n");
00980             avctx->has_b_frames--;
00981         } else if (rec_ret == RET_COPY_NEXT_FIELD) {
00982             /*
00983              * This case is for when the encoded fields are stored in a
00984              * single avpkt but the hardware returns then separately. Unless
00985              * we grab the second field before returning, we'll slip another
00986              * frame in the pipeline and if that happens a lot, we're sunk.
00987              * So we have to get that second field now.
00988              * Interlaced mpeg2 and vc1 are examples of this.
00989              */
00990             av_log(avctx, AV_LOG_VERBOSE, "Trying to get second field.\n");
00991             while (1) {
00992                 usleep(priv->decode_wait);
00993                 ret = DtsGetDriverStatus(dev, &decoder_status);
00994                 if (ret == BC_STS_SUCCESS &&
00995                     decoder_status.ReadyListCount > 0) {
00996                     rec_ret = receive_frame(avctx, data, data_size);
00997                     if ((rec_ret == RET_OK && *data_size > 0) ||
00998                         rec_ret == RET_ERROR)
00999                         break;
01000                 }
01001             }
01002             av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Got second field.\n");
01003         } else if (rec_ret == RET_SKIP_NEXT_COPY) {
01004             /*
01005              * Two input packets got turned into a field pair. Gawd.
01006              */
01007             av_log(avctx, AV_LOG_VERBOSE,
01008                    "Don't output on next decode call.\n");
01009             priv->skip_next_output = 1;
01010         }
01011         /*
01012          * If rec_ret == RET_COPY_AGAIN, that means that either we just handled
01013          * a FMT_CHANGE event and need to go around again for the actual frame,
01014          * we got a busy status and need to try again, or we're dealing with
01015          * packed b-frames, where the hardware strangely returns the packed
01016          * p-frame twice. We choose to keep the second copy as it carries the
01017          * valid pts.
01018          */
01019     } while (rec_ret == RET_COPY_AGAIN);
01020     usleep(priv->decode_wait);
01021     return len;
01022 }
01023 
01024 
01025 #if CONFIG_H264_CRYSTALHD_DECODER
01026 static AVClass h264_class = {
01027     "h264_crystalhd",
01028     av_default_item_name,
01029     options,
01030     LIBAVUTIL_VERSION_INT,
01031 };
01032 
01033 AVCodec ff_h264_crystalhd_decoder = {
01034     .name           = "h264_crystalhd",
01035     .type           = AVMEDIA_TYPE_VIDEO,
01036     .id             = CODEC_ID_H264,
01037     .priv_data_size = sizeof(CHDContext),
01038     .init           = init,
01039     .close          = uninit,
01040     .decode         = decode,
01041     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
01042     .flush          = flush,
01043     .long_name      = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (CrystalHD acceleration)"),
01044     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
01045     .priv_class     = &h264_class,
01046 };
01047 #endif
01048 
01049 #if CONFIG_MPEG2_CRYSTALHD_DECODER
01050 static AVClass mpeg2_class = {
01051     "mpeg2_crystalhd",
01052     av_default_item_name,
01053     options,
01054     LIBAVUTIL_VERSION_INT,
01055 };
01056 
01057 AVCodec ff_mpeg2_crystalhd_decoder = {
01058     .name           = "mpeg2_crystalhd",
01059     .type           = AVMEDIA_TYPE_VIDEO,
01060     .id             = CODEC_ID_MPEG2VIDEO,
01061     .priv_data_size = sizeof(CHDContext),
01062     .init           = init,
01063     .close          = uninit,
01064     .decode         = decode,
01065     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
01066     .flush          = flush,
01067     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-2 Video (CrystalHD acceleration)"),
01068     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
01069     .priv_class     = &mpeg2_class,
01070 };
01071 #endif
01072 
01073 #if CONFIG_MPEG4_CRYSTALHD_DECODER
01074 static AVClass mpeg4_class = {
01075     "mpeg4_crystalhd",
01076     av_default_item_name,
01077     options,
01078     LIBAVUTIL_VERSION_INT,
01079 };
01080 
01081 AVCodec ff_mpeg4_crystalhd_decoder = {
01082     .name           = "mpeg4_crystalhd",
01083     .type           = AVMEDIA_TYPE_VIDEO,
01084     .id             = CODEC_ID_MPEG4,
01085     .priv_data_size = sizeof(CHDContext),
01086     .init           = init,
01087     .close          = uninit,
01088     .decode         = decode,
01089     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
01090     .flush          = flush,
01091     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 (CrystalHD acceleration)"),
01092     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
01093     .priv_class     = &mpeg4_class,
01094 };
01095 #endif
01096 
01097 #if CONFIG_MSMPEG4_CRYSTALHD_DECODER
01098 static AVClass msmpeg4_class = {
01099     "msmpeg4_crystalhd",
01100     av_default_item_name,
01101     options,
01102     LIBAVUTIL_VERSION_INT,
01103 };
01104 
01105 AVCodec ff_msmpeg4_crystalhd_decoder = {
01106     .name           = "msmpeg4_crystalhd",
01107     .type           = AVMEDIA_TYPE_VIDEO,
01108     .id             = CODEC_ID_MSMPEG4V3,
01109     .priv_data_size = sizeof(CHDContext),
01110     .init           = init,
01111     .close          = uninit,
01112     .decode         = decode,
01113     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
01114     .flush          = flush,
01115     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 Microsoft variant version 3 (CrystalHD acceleration)"),
01116     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
01117     .priv_class     = &msmpeg4_class,
01118 };
01119 #endif
01120 
01121 #if CONFIG_VC1_CRYSTALHD_DECODER
01122 static AVClass vc1_class = {
01123     "vc1_crystalhd",
01124     av_default_item_name,
01125     options,
01126     LIBAVUTIL_VERSION_INT,
01127 };
01128 
01129 AVCodec ff_vc1_crystalhd_decoder = {
01130     .name           = "vc1_crystalhd",
01131     .type           = AVMEDIA_TYPE_VIDEO,
01132     .id             = CODEC_ID_VC1,
01133     .priv_data_size = sizeof(CHDContext),
01134     .init           = init,
01135     .close          = uninit,
01136     .decode         = decode,
01137     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
01138     .flush          = flush,
01139     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1 (CrystalHD acceleration)"),
01140     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
01141     .priv_class     = &vc1_class,
01142 };
01143 #endif
01144 
01145 #if CONFIG_WMV3_CRYSTALHD_DECODER
01146 static AVClass wmv3_class = {
01147     "wmv3_crystalhd",
01148     av_default_item_name,
01149     options,
01150     LIBAVUTIL_VERSION_INT,
01151 };
01152 
01153 AVCodec ff_wmv3_crystalhd_decoder = {
01154     .name           = "wmv3_crystalhd",
01155     .type           = AVMEDIA_TYPE_VIDEO,
01156     .id             = CODEC_ID_WMV3,
01157     .priv_data_size = sizeof(CHDContext),
01158     .init           = init,
01159     .close          = uninit,
01160     .decode         = decode,
01161     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
01162     .flush          = flush,
01163     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 (CrystalHD acceleration)"),
01164     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
01165     .priv_class     = &wmv3_class,
01166 };
01167 #endif