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ffmpeg/libavcodec/crystalhd.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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/*
* - CrystalHD decoder module -
*
* Copyright(C) 2010,2011 Philip Langdale <ffmpeg.philipl@overt.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* - Principles of Operation -
*
* The CrystalHD decoder operates at the bitstream level - which is an even
* higher level than the decoding hardware you typically see in modern GPUs.
* This means it has a very simple interface, in principle. You feed demuxed
* packets in one end and get decoded picture (fields/frames) out the other.
*
* Of course, nothing is ever that simple. Due, at the very least, to b-frame
* dependencies in the supported formats, the hardware has a delay between
* when a packet goes in, and when a picture comes out. Furthermore, this delay
* is not just a function of time, but also one of the dependency on additional
* frames being fed into the decoder to satisfy the b-frame dependencies.
*
* As such, the hardware can only be used effectively with a decode API that
* doesn't assume a 1:1 relationship between input packets and output frames.
* The new avcodec decode API is such an API (an m:n API) while the old one is
* 1:1. Consequently, we no longer support the old API, which allows us to avoid
* the vicious hacks that are required to approximate 1:1 operation.
*/
/*****************************************************************************
* Includes
****************************************************************************/
#define _XOPEN_SOURCE 600
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <libcrystalhd/bc_dts_types.h>
#include <libcrystalhd/bc_dts_defs.h>
#include <libcrystalhd/libcrystalhd_if.h>
#include "avcodec.h"
#include "decode.h"
#include "internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
/** Timeout parameter passed to DtsProcOutput() in us */
#define OUTPUT_PROC_TIMEOUT 50
/** Step between fake timestamps passed to hardware in units of 100ns */
#define TIMESTAMP_UNIT 100000
/*****************************************************************************
* Module private data
****************************************************************************/
typedef enum {
RET_ERROR = -1,
RET_OK = 0,
RET_COPY_AGAIN = 1,
} CopyRet;
typedef struct OpaqueList {
struct OpaqueList *next;
uint64_t fake_timestamp;
uint64_t reordered_opaque;
} OpaqueList;
typedef struct {
AVClass *av_class;
AVCodecContext *avctx;
HANDLE dev;
uint8_t is_70012;
uint8_t need_second_field;
uint8_t draining;
OpaqueList *head;
OpaqueList *tail;
/* Options */
uint32_t sWidth;
} CHDContext;
static const AVOption options[] = {
{ "crystalhd_downscale_width",
"Turn on downscaling to the specified width",
offsetof(CHDContext, sWidth),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT32_MAX,
AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM, },
{ NULL, },
};
/*****************************************************************************
* Helper functions
****************************************************************************/
static inline BC_MEDIA_SUBTYPE id2subtype(CHDContext *priv, enum AVCodecID id)
{
switch (id) {
case AV_CODEC_ID_MPEG4:
return BC_MSUBTYPE_DIVX;
case AV_CODEC_ID_MSMPEG4V3:
return BC_MSUBTYPE_DIVX311;
case AV_CODEC_ID_MPEG2VIDEO:
return BC_MSUBTYPE_MPEG2VIDEO;
case AV_CODEC_ID_VC1:
return BC_MSUBTYPE_VC1;
case AV_CODEC_ID_WMV3:
return BC_MSUBTYPE_WMV3;
case AV_CODEC_ID_H264:
return BC_MSUBTYPE_H264;
default:
return BC_MSUBTYPE_INVALID;
}
}
static inline void print_frame_info(CHDContext *priv, BC_DTS_PROC_OUT *output)
{
av_log(priv->avctx, AV_LOG_TRACE, "\tYBuffSz: %u\n", output->YbuffSz);
av_log(priv->avctx, AV_LOG_TRACE, "\tYBuffDoneSz: %u\n",
output->YBuffDoneSz);
av_log(priv->avctx, AV_LOG_TRACE, "\tUVBuffDoneSz: %u\n",
output->UVBuffDoneSz);
av_log(priv->avctx, AV_LOG_TRACE, "\tTimestamp: %"PRIu64"\n",
output->PicInfo.timeStamp);
av_log(priv->avctx, AV_LOG_TRACE, "\tPicture Number: %u\n",
output->PicInfo.picture_number);
av_log(priv->avctx, AV_LOG_TRACE, "\tWidth: %u\n",
output->PicInfo.width);
av_log(priv->avctx, AV_LOG_TRACE, "\tHeight: %u\n",
output->PicInfo.height);
av_log(priv->avctx, AV_LOG_TRACE, "\tChroma: 0x%03x\n",
output->PicInfo.chroma_format);
av_log(priv->avctx, AV_LOG_TRACE, "\tPulldown: %u\n",
output->PicInfo.pulldown);
av_log(priv->avctx, AV_LOG_TRACE, "\tFlags: 0x%08x\n",
output->PicInfo.flags);
av_log(priv->avctx, AV_LOG_TRACE, "\tFrame Rate/Res: %u\n",
output->PicInfo.frame_rate);
av_log(priv->avctx, AV_LOG_TRACE, "\tAspect Ratio: %u\n",
output->PicInfo.aspect_ratio);
av_log(priv->avctx, AV_LOG_TRACE, "\tColor Primaries: %u\n",
output->PicInfo.colour_primaries);
av_log(priv->avctx, AV_LOG_TRACE, "\tMetaData: %u\n",
output->PicInfo.picture_meta_payload);
av_log(priv->avctx, AV_LOG_TRACE, "\tSession Number: %u\n",
output->PicInfo.sess_num);
av_log(priv->avctx, AV_LOG_TRACE, "\tycom: %u\n",
output->PicInfo.ycom);
av_log(priv->avctx, AV_LOG_TRACE, "\tCustom Aspect: %u\n",
output->PicInfo.custom_aspect_ratio_width_height);
av_log(priv->avctx, AV_LOG_TRACE, "\tFrames to Drop: %u\n",
output->PicInfo.n_drop);
av_log(priv->avctx, AV_LOG_TRACE, "\tH264 Valid Fields: 0x%08x\n",
output->PicInfo.other.h264.valid);
}
/*****************************************************************************
* OpaqueList functions
****************************************************************************/
static uint64_t opaque_list_push(CHDContext *priv, uint64_t reordered_opaque)
{
OpaqueList *newNode = av_mallocz(sizeof (OpaqueList));
if (!newNode) {
av_log(priv->avctx, AV_LOG_ERROR,
"Unable to allocate new node in OpaqueList.\n");
return 0;
}
if (!priv->head) {
newNode->fake_timestamp = TIMESTAMP_UNIT;
priv->head = newNode;
} else {
newNode->fake_timestamp = priv->tail->fake_timestamp + TIMESTAMP_UNIT;
priv->tail->next = newNode;
}
priv->tail = newNode;
newNode->reordered_opaque = reordered_opaque;
return newNode->fake_timestamp;
}
/*
* The OpaqueList is built in decode order, while elements will be removed
* in presentation order. If frames are reordered, this means we must be
* able to remove elements that are not the first element.
*
* Returned node must be freed by caller.
*/
static OpaqueList *opaque_list_pop(CHDContext *priv, uint64_t fake_timestamp)
{
OpaqueList *node = priv->head;
if (!priv->head) {
av_log(priv->avctx, AV_LOG_ERROR,
"CrystalHD: Attempted to query non-existent timestamps.\n");
return NULL;
}
/*
* The first element is special-cased because we have to manipulate
* the head pointer rather than the previous element in the list.
*/
if (priv->head->fake_timestamp == fake_timestamp) {
priv->head = node->next;
if (!priv->head->next)
priv->tail = priv->head;
node->next = NULL;
return node;
}
/*
* The list is processed at arm's length so that we have the
* previous element available to rewrite its next pointer.
*/
while (node->next) {
OpaqueList *current = node->next;
if (current->fake_timestamp == fake_timestamp) {
node->next = current->next;
if (!node->next)
priv->tail = node;
current->next = NULL;
return current;
} else {
node = current;
}
}
av_log(priv->avctx, AV_LOG_VERBOSE,
"CrystalHD: Couldn't match fake_timestamp.\n");
return NULL;
}
/*****************************************************************************
* Video decoder API function definitions
****************************************************************************/
static void flush(AVCodecContext *avctx)
{
CHDContext *priv = avctx->priv_data;
priv->need_second_field = 0;
priv->draining = 0;
/* Flush mode 4 flushes all software and hardware buffers. */
DtsFlushInput(priv->dev, 4);
}
static av_cold int uninit(AVCodecContext *avctx)
{
CHDContext *priv = avctx->priv_data;
HANDLE device;
device = priv->dev;
DtsStopDecoder(device);
DtsCloseDecoder(device);
DtsDeviceClose(device);
if (priv->head) {
OpaqueList *node = priv->head;
while (node) {
OpaqueList *next = node->next;
av_free(node);
node = next;
}
}
return 0;
}
static av_cold int init(AVCodecContext *avctx)
{
CHDContext* priv;
BC_STATUS ret;
BC_INFO_CRYSTAL version;
BC_INPUT_FORMAT format = {
.FGTEnable = FALSE,
.Progressive = TRUE,
.OptFlags = 0x80000000 | vdecFrameRate59_94 | 0x40,
.width = avctx->width,
.height = avctx->height,
};
BC_MEDIA_SUBTYPE subtype;
uint32_t mode = DTS_PLAYBACK_MODE |
DTS_LOAD_FILE_PLAY_FW |
DTS_SKIP_TX_CHK_CPB |
DTS_PLAYBACK_DROP_RPT_MODE |
DTS_SINGLE_THREADED_MODE |
DTS_DFLT_RESOLUTION(vdecRESOLUTION_1080p23_976);
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD Init for %s\n",
avctx->codec->name);
avctx->pix_fmt = AV_PIX_FMT_YUYV422;
/* Initialize the library */
priv = avctx->priv_data;
priv->avctx = avctx;
priv->draining = 0;
subtype = id2subtype(priv, avctx->codec->id);
switch (subtype) {
case BC_MSUBTYPE_H264:
format.startCodeSz = 4;
// Fall-through
case BC_MSUBTYPE_VC1:
case BC_MSUBTYPE_WVC1:
case BC_MSUBTYPE_WMV3:
case BC_MSUBTYPE_WMVA:
case BC_MSUBTYPE_MPEG2VIDEO:
case BC_MSUBTYPE_DIVX:
case BC_MSUBTYPE_DIVX311:
format.pMetaData = avctx->extradata;
format.metaDataSz = avctx->extradata_size;
break;
default:
av_log(avctx, AV_LOG_ERROR, "CrystalHD: Unknown codec name\n");
return AVERROR(EINVAL);
}
format.mSubtype = subtype;
if (priv->sWidth) {
format.bEnableScaling = 1;
format.ScalingParams.sWidth = priv->sWidth;
}
/* Get a decoder instance */
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: starting up\n");
// Initialize the Link and Decoder devices
ret = DtsDeviceOpen(&priv->dev, mode);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: DtsDeviceOpen failed\n");
goto fail;
}
ret = DtsCrystalHDVersion(priv->dev, &version);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_VERBOSE,
"CrystalHD: DtsCrystalHDVersion failed\n");
goto fail;
}
priv->is_70012 = version.device == 0;
if (priv->is_70012 &&
(subtype == BC_MSUBTYPE_DIVX || subtype == BC_MSUBTYPE_DIVX311)) {
av_log(avctx, AV_LOG_VERBOSE,
"CrystalHD: BCM70012 doesn't support MPEG4-ASP/DivX/Xvid\n");
goto fail;
}
ret = DtsSetInputFormat(priv->dev, &format);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: SetInputFormat failed\n");
goto fail;
}
ret = DtsOpenDecoder(priv->dev, BC_STREAM_TYPE_ES);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsOpenDecoder failed\n");
goto fail;
}
ret = DtsSetColorSpace(priv->dev, OUTPUT_MODE422_YUY2);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsSetColorSpace failed\n");
goto fail;
}
ret = DtsStartDecoder(priv->dev);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsStartDecoder failed\n");
goto fail;
}
ret = DtsStartCapture(priv->dev);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: DtsStartCapture failed\n");
goto fail;
}
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Init complete.\n");
return 0;
fail:
uninit(avctx);
return -1;
}
static inline CopyRet copy_frame(AVCodecContext *avctx,
BC_DTS_PROC_OUT *output,
AVFrame *frame, int *got_frame)
{
BC_STATUS ret;
BC_DTS_STATUS decoder_status = { 0, };
uint8_t interlaced;
CHDContext *priv = avctx->priv_data;
int64_t pkt_pts = AV_NOPTS_VALUE;
uint8_t bottom_field = (output->PicInfo.flags & VDEC_FLAG_BOTTOMFIELD) ==
VDEC_FLAG_BOTTOMFIELD;
uint8_t bottom_first = !!(output->PicInfo.flags & VDEC_FLAG_BOTTOM_FIRST);
int width = output->PicInfo.width;
int height = output->PicInfo.height;
int bwidth;
uint8_t *src = output->Ybuff;
int sStride;
uint8_t *dst;
int dStride;
if (output->PicInfo.timeStamp != 0) {
OpaqueList *node = opaque_list_pop(priv, output->PicInfo.timeStamp);
if (node) {
pkt_pts = node->reordered_opaque;
av_free(node);
} else {
/*
* We will encounter a situation where a timestamp cannot be
* popped if a second field is being returned. In this case,
* each field has the same timestamp and the first one will
* cause it to be popped. We'll avoid overwriting the valid
* timestamp below.
*/
}
av_log(avctx, AV_LOG_VERBOSE, "output \"pts\": %"PRIu64"\n",
output->PicInfo.timeStamp);
}
ret = DtsGetDriverStatus(priv->dev, &decoder_status);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR,
"CrystalHD: GetDriverStatus failed: %u\n", ret);
return RET_ERROR;
}
interlaced = output->PicInfo.flags & VDEC_FLAG_INTERLACED_SRC;
av_log(avctx, AV_LOG_VERBOSE, "Interlaced state: %d\n",
interlaced);
priv->need_second_field = interlaced && !priv->need_second_field;
if (!frame->data[0]) {
if (ff_get_buffer(avctx, frame, 0) < 0)
return RET_ERROR;
}
bwidth = av_image_get_linesize(avctx->pix_fmt, width, 0);
if (bwidth < 0)
return RET_ERROR;
if (priv->is_70012) {
int pStride;
if (width <= 720)
pStride = 720;
else if (width <= 1280)
pStride = 1280;
else pStride = 1920;
sStride = av_image_get_linesize(avctx->pix_fmt, pStride, 0);
if (sStride < 0)
return RET_ERROR;
} else {
sStride = bwidth;
}
dStride = frame->linesize[0];
dst = frame->data[0];
av_log(priv->avctx, AV_LOG_VERBOSE, "CrystalHD: Copying out frame\n");
/*
* The hardware doesn't return the first sample of a picture.
* Ignoring why it behaves this way, it's better to copy the sample from
* the second line, rather than the next sample across because the chroma
* values should be correct (assuming the decoded video was 4:2:0, which
* it was).
*/
*((uint32_t *)src) = *((uint32_t *)(src + sStride));
if (interlaced) {
int dY = 0;
int sY = 0;
height /= 2;
if (bottom_field) {
av_log(priv->avctx, AV_LOG_VERBOSE, "Interlaced: bottom field\n");
dY = 1;
} else {
av_log(priv->avctx, AV_LOG_VERBOSE, "Interlaced: top field\n");
dY = 0;
}
for (sY = 0; sY < height; dY++, sY++) {
memcpy(&(dst[dY * dStride]), &(src[sY * sStride]), bwidth);
dY++;
}
} else {
av_image_copy_plane(dst, dStride, src, sStride, bwidth, height);
}
frame->interlaced_frame = interlaced;
if (interlaced)
frame->top_field_first = !bottom_first;
frame->pts = pkt_pts;
frame->pkt_pos = -1;
frame->pkt_duration = 0;
frame->pkt_size = -1;
if (!priv->need_second_field) {
*got_frame = 1;
} else {
return RET_COPY_AGAIN;
}
return RET_OK;
}
static inline CopyRet receive_frame(AVCodecContext *avctx,
AVFrame *frame, int *got_frame)
{
BC_STATUS ret;
BC_DTS_PROC_OUT output = {
.PicInfo.width = avctx->width,
.PicInfo.height = avctx->height,
};
CHDContext *priv = avctx->priv_data;
HANDLE dev = priv->dev;
*got_frame = 0;
// Request decoded data from the driver
ret = DtsProcOutputNoCopy(dev, OUTPUT_PROC_TIMEOUT, &output);
if (ret == BC_STS_FMT_CHANGE) {
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Initial format change\n");
avctx->width = output.PicInfo.width;
avctx->height = output.PicInfo.height;
switch ( output.PicInfo.aspect_ratio ) {
case vdecAspectRatioSquare:
avctx->sample_aspect_ratio = (AVRational) { 1, 1};
break;
case vdecAspectRatio12_11:
avctx->sample_aspect_ratio = (AVRational) { 12, 11};
break;
case vdecAspectRatio10_11:
avctx->sample_aspect_ratio = (AVRational) { 10, 11};
break;
case vdecAspectRatio16_11:
avctx->sample_aspect_ratio = (AVRational) { 16, 11};
break;
case vdecAspectRatio40_33:
avctx->sample_aspect_ratio = (AVRational) { 40, 33};
break;
case vdecAspectRatio24_11:
avctx->sample_aspect_ratio = (AVRational) { 24, 11};
break;
case vdecAspectRatio20_11:
avctx->sample_aspect_ratio = (AVRational) { 20, 11};
break;
case vdecAspectRatio32_11:
avctx->sample_aspect_ratio = (AVRational) { 32, 11};
break;
case vdecAspectRatio80_33:
avctx->sample_aspect_ratio = (AVRational) { 80, 33};
break;
case vdecAspectRatio18_11:
avctx->sample_aspect_ratio = (AVRational) { 18, 11};
break;
case vdecAspectRatio15_11:
avctx->sample_aspect_ratio = (AVRational) { 15, 11};
break;
case vdecAspectRatio64_33:
avctx->sample_aspect_ratio = (AVRational) { 64, 33};
break;
case vdecAspectRatio160_99:
avctx->sample_aspect_ratio = (AVRational) {160, 99};
break;
case vdecAspectRatio4_3:
avctx->sample_aspect_ratio = (AVRational) { 4, 3};
break;
case vdecAspectRatio16_9:
avctx->sample_aspect_ratio = (AVRational) { 16, 9};
break;
case vdecAspectRatio221_1:
avctx->sample_aspect_ratio = (AVRational) {221, 1};
break;
}
return RET_COPY_AGAIN;
} else if (ret == BC_STS_SUCCESS) {
int copy_ret = -1;
if (output.PoutFlags & BC_POUT_FLAGS_PIB_VALID) {
print_frame_info(priv, &output);
copy_ret = copy_frame(avctx, &output, frame, got_frame);
} else {
/*
* An invalid frame has been consumed.
*/
av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput succeeded with "
"invalid PIB\n");
copy_ret = RET_COPY_AGAIN;
}
DtsReleaseOutputBuffs(dev, NULL, FALSE);
return copy_ret;
} else if (ret == BC_STS_BUSY) {
return RET_COPY_AGAIN;
} else {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput failed %d\n", ret);
return RET_ERROR;
}
}
static int crystalhd_decode_packet(AVCodecContext *avctx, const AVPacket *avpkt)
{
BC_STATUS bc_ret;
CHDContext *priv = avctx->priv_data;
HANDLE dev = priv->dev;
int ret = 0;
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: decode_packet\n");
if (avpkt && avpkt->size) {
uint64_t pts;
/*
* Despite being notionally opaque, either libcrystalhd or
* the hardware itself will mangle pts values that are too
* small or too large. The docs claim it should be in units
* of 100ns. Given that we're nominally dealing with a black
* box on both sides, any transform we do has no guarantee of
* avoiding mangling so we need to build a mapping to values
* we know will not be mangled.
*/
pts = opaque_list_push(priv, avpkt->pts);
if (!pts) {
ret = AVERROR(ENOMEM);
goto exit;
}
av_log(priv->avctx, AV_LOG_VERBOSE,
"input \"pts\": %"PRIu64"\n", pts);
bc_ret = DtsProcInput(dev, avpkt->data, avpkt->size, pts, 0);
if (bc_ret == BC_STS_BUSY) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: ProcInput returned busy\n");
ret = AVERROR(EAGAIN);
goto exit;
} else if (bc_ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR,
"CrystalHD: ProcInput failed: %u\n", ret);
ret = -1;
goto exit;
}
} else {
av_log(avctx, AV_LOG_INFO, "CrystalHD: No more input data\n");
priv->draining = 1;
ret = AVERROR_EOF;
goto exit;
}
exit:
return ret;
}
static int crystalhd_receive_frame(AVCodecContext *avctx, AVFrame *frame)
{
BC_STATUS bc_ret;
BC_DTS_STATUS decoder_status = { 0, };
CopyRet rec_ret;
CHDContext *priv = avctx->priv_data;
HANDLE dev = priv->dev;
int got_frame = 0;
int ret = 0;
AVPacket pkt = {0};
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: receive_frame\n");
ret = ff_decode_get_packet(avctx, &pkt);
if (ret < 0 && ret != AVERROR_EOF) {
return ret;
}
while (pkt.size > DtsTxFreeSize(dev)) {
/*
* Block until there is space in the buffer for the next packet.
* We assume that the hardware will make forward progress at this
* point, although in pathological cases that may not happen.
*/
av_log(avctx, AV_LOG_TRACE, "CrystalHD: Waiting for space in input buffer\n");
}
ret = crystalhd_decode_packet(avctx, &pkt);
av_packet_unref(&pkt);
// crystalhd_is_buffer_full() should avoid this.
if (ret == AVERROR(EAGAIN)) {
ret = AVERROR_EXTERNAL;
}
if (ret < 0 && ret != AVERROR_EOF) {
return ret;
}
do {
bc_ret = DtsGetDriverStatus(dev, &decoder_status);
if (bc_ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: GetDriverStatus failed\n");
return -1;
}
if (decoder_status.ReadyListCount == 0) {
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Insufficient frames ready. Returning\n");
got_frame = 0;
rec_ret = RET_OK;
break;
}
rec_ret = receive_frame(avctx, frame, &got_frame);
} while (rec_ret == RET_COPY_AGAIN);
if (rec_ret == RET_ERROR) {
return -1;
} else if (got_frame == 0) {
return priv->draining ? AVERROR_EOF : AVERROR(EAGAIN);
} else {
return 0;
}
}
#define DEFINE_CRYSTALHD_DECODER(x, X, bsf_name) \
static const AVClass x##_crystalhd_class = { \
.class_name = #x "_crystalhd", \
.item_name = av_default_item_name, \
.option = options, \
.version = LIBAVUTIL_VERSION_INT, \
}; \
const AVCodec ff_##x##_crystalhd_decoder = { \
.name = #x "_crystalhd", \
.long_name = NULL_IF_CONFIG_SMALL("CrystalHD " #X " decoder"), \
.type = AVMEDIA_TYPE_VIDEO, \
.id = AV_CODEC_ID_##X, \
.priv_data_size = sizeof(CHDContext), \
.priv_class = &x##_crystalhd_class, \
.init = init, \
.close = uninit, \
.receive_frame = crystalhd_receive_frame, \
.flush = flush, \
.bsfs = bsf_name, \
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AVOID_PROBING | AV_CODEC_CAP_HARDWARE, \
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE}, \
.wrapper_name = "crystalhd", \
};
#if CONFIG_H264_CRYSTALHD_DECODER
DEFINE_CRYSTALHD_DECODER(h264, H264, "h264_mp4toannexb")
#endif
#if CONFIG_MPEG2_CRYSTALHD_DECODER
DEFINE_CRYSTALHD_DECODER(mpeg2, MPEG2VIDEO, NULL)
#endif
#if CONFIG_MPEG4_CRYSTALHD_DECODER
DEFINE_CRYSTALHD_DECODER(mpeg4, MPEG4, "mpeg4_unpack_bframes")
#endif
#if CONFIG_MSMPEG4_CRYSTALHD_DECODER
DEFINE_CRYSTALHD_DECODER(msmpeg4, MSMPEG4V3, NULL)
#endif
#if CONFIG_VC1_CRYSTALHD_DECODER
DEFINE_CRYSTALHD_DECODER(vc1, VC1, NULL)
#endif
#if CONFIG_WMV3_CRYSTALHD_DECODER
DEFINE_CRYSTALHD_DECODER(wmv3, WMV3, NULL)
#endif
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