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third_party_ffmpeg/libavcodec/crystalhd.c
Philip Langdale 969eb21ba2 CrystalHD: Use doxygen compatible comments where relevant. 
Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2011-03-17 13:02:23 +01:00

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/*
* - CrystalHD decoder module -
*
* Copyright(C) 2010 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, a pipeline will build up that is roughly equivalent to the required
* DPB for the file being played. If that was all it took, things would still
* be simple - so, of course, it isn't.
*
* The hardware has a way of indicating that a picture is ready to be copied out,
* but this is unreliable - and sometimes the attempt will still fail so, based
* on testing, the code will wait until 3 pictures are ready before starting
* to copy out - and this has the effect of extending the pipeline.
*
* Finally, while it is tempting to say that once the decoder starts outputing
* frames, the software should never fail to return a frame from a decode(),
* this is a hard assertion to make, because the stream may switch between
* differently encoded content (number of b-frames, interlacing, etc) which
* might require a longer pipeline than before. If that happened, you could
* deadlock trying to retrieve a frame that can't be decoded without feeding
* in additional packets.
*
* As such, the code will return in the event that a picture cannot be copied
* out, leading to an increase in the length of the pipeline. This in turn,
* means we have to be sensitive to the time it takes to decode a picture;
* We do not want to give up just because the hardware needed a little more
* time to prepare the picture! For this reason, there are delays included
* in the decode() path that ensure that, under normal conditions, the hardware
* will only fail to return a frame if it really needs additional packets to
* complete the decoding.
*
* Finally, to be explicit, we do not want the pipeline to grow without bound
* for two reasons: 1) The hardware can only buffer a finite number of packets,
* and 2) The client application may not be able to cope with arbitrarily long
* delays in the video path relative to the audio path. For example. MPlayer
* can only handle a 20 picture delay (although this is arbitrary, and needs
* to be extended to fully support the CrystalHD where the delay could be up
* to 32 pictures - consider PAFF H.264 content with 16 b-frames).
*/
/*****************************************************************************
* Includes
****************************************************************************/
#define _XOPEN_SOURCE 600
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <libcrystalhd/bc_dts_types.h>
#include <libcrystalhd/bc_dts_defs.h>
#include <libcrystalhd/libcrystalhd_if.h>
#include "avcodec.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
/** 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
/** Initial value in us of the wait in decode() */
#define BASE_WAIT 10000
/** Increment in us to adjust wait in decode() */
#define WAIT_UNIT 1000
/*****************************************************************************
* Module private data
****************************************************************************/
typedef enum {
RET_ERROR = -1,
RET_OK = 0,
RET_COPY_AGAIN = 1,
RET_SKIP_NEXT_COPY = 2,
} CopyRet;
typedef struct OpaqueList {
struct OpaqueList *next;
uint64_t fake_timestamp;
uint64_t reordered_opaque;
} OpaqueList;
typedef struct {
AVCodecContext *avctx;
AVFrame pic;
HANDLE dev;
uint8_t is_70012;
uint8_t *sps_pps_buf;
uint32_t sps_pps_size;
uint8_t is_nal;
uint8_t output_ready;
uint8_t need_second_field;
uint8_t skip_next_output;
uint64_t decode_wait;
uint64_t last_picture;
OpaqueList *head;
OpaqueList *tail;
} CHDContext;
/*****************************************************************************
* Helper functions
****************************************************************************/
static inline BC_MEDIA_SUBTYPE id2subtype(CHDContext *priv, enum CodecID id)
{
switch (id) {
case CODEC_ID_MPEG4:
return BC_MSUBTYPE_DIVX;
case CODEC_ID_MSMPEG4V3:
return BC_MSUBTYPE_DIVX311;
case CODEC_ID_MPEG2VIDEO:
return BC_MSUBTYPE_MPEG2VIDEO;
case CODEC_ID_VC1:
return BC_MSUBTYPE_VC1;
case CODEC_ID_WMV3:
return BC_MSUBTYPE_WMV3;
case CODEC_ID_H264:
return priv->is_nal ? BC_MSUBTYPE_AVC1 : 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_VERBOSE, "\tYBuffSz: %u\n", output->YbuffSz);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tYBuffDoneSz: %u\n",
output->YBuffDoneSz);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tUVBuffDoneSz: %u\n",
output->UVBuffDoneSz);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tTimestamp: %"PRIu64"\n",
output->PicInfo.timeStamp);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tPicture Number: %u\n",
output->PicInfo.picture_number);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tWidth: %u\n",
output->PicInfo.width);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tHeight: %u\n",
output->PicInfo.height);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tChroma: 0x%03x\n",
output->PicInfo.chroma_format);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tPulldown: %u\n",
output->PicInfo.pulldown);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tFlags: 0x%08x\n",
output->PicInfo.flags);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tFrame Rate/Res: %u\n",
output->PicInfo.frame_rate);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tAspect Ratio: %u\n",
output->PicInfo.aspect_ratio);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tColor Primaries: %u\n",
output->PicInfo.colour_primaries);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tMetaData: %u\n",
output->PicInfo.picture_meta_payload);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tSession Number: %u\n",
output->PicInfo.sess_num);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tycom: %u\n",
output->PicInfo.ycom);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tCustom Aspect: %u\n",
output->PicInfo.custom_aspect_ratio_width_height);
av_log(priv->avctx, AV_LOG_VERBOSE, "\tFrames to Drop: %u\n",
output->PicInfo.n_drop);
av_log(priv->avctx, AV_LOG_VERBOSE, "\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.
*/
static uint64_t 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 AV_NOPTS_VALUE;
}
/*
* 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) {
uint64_t reordered_opaque = node->reordered_opaque;
priv->head = node->next;
av_free(node);
if (!priv->head->next)
priv->tail = priv->head;
return reordered_opaque;
}
/*
* 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 *next = node->next;
if (next->fake_timestamp == fake_timestamp) {
uint64_t reordered_opaque = next->reordered_opaque;
node->next = next->next;
av_free(next);
if (!node->next)
priv->tail = node;
return reordered_opaque;
} else {
node = next;
}
}
av_log(priv->avctx, AV_LOG_VERBOSE,
"CrystalHD: Couldn't match fake_timestamp.\n");
return AV_NOPTS_VALUE;
}
/*****************************************************************************
* Video decoder API function definitions
****************************************************************************/
static void flush(AVCodecContext *avctx)
{
CHDContext *priv = avctx->priv_data;
avctx->has_b_frames = 0;
priv->last_picture = -1;
priv->output_ready = 0;
priv->need_second_field = 0;
priv->skip_next_output = 0;
priv->decode_wait = BASE_WAIT;
if (priv->pic.data[0])
avctx->release_buffer(avctx, &priv->pic);
/* 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);
av_free(priv->sps_pps_buf);
if (priv->pic.data[0])
avctx->release_buffer(avctx, &priv->pic);
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 = PIX_FMT_YUYV422;
/* Initialize the library */
priv = avctx->priv_data;
priv->avctx = avctx;
priv->is_nal = avctx->extradata_size > 0 && *(avctx->extradata) == 1;
priv->last_picture = -1;
priv->decode_wait = BASE_WAIT;
subtype = id2subtype(priv, avctx->codec->id);
switch (subtype) {
case BC_MSUBTYPE_AVC1:
{
uint8_t *dummy_p;
int dummy_int;
AVBitStreamFilterContext *bsfc;
uint32_t orig_data_size = avctx->extradata_size;
uint8_t *orig_data = av_malloc(orig_data_size);
if (!orig_data) {
av_log(avctx, AV_LOG_ERROR,
"Failed to allocate copy of extradata\n");
return AVERROR(ENOMEM);
}
memcpy(orig_data, avctx->extradata, orig_data_size);
bsfc = av_bitstream_filter_init("h264_mp4toannexb");
if (!bsfc) {
av_log(avctx, AV_LOG_ERROR,
"Cannot open the h264_mp4toannexb BSF!\n");
av_free(orig_data);
return AVERROR_BSF_NOT_FOUND;
}
av_bitstream_filter_filter(bsfc, avctx, NULL, &dummy_p,
&dummy_int, NULL, 0, 0);
av_bitstream_filter_close(bsfc);
priv->sps_pps_buf = avctx->extradata;
priv->sps_pps_size = avctx->extradata_size;
avctx->extradata = orig_data;
avctx->extradata_size = orig_data_size;
format.pMetaData = priv->sps_pps_buf;
format.metaDataSz = priv->sps_pps_size;
format.startCodeSz = (avctx->extradata[4] & 0x03) + 1;
}
break;
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;
/* 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;
}
/*
* The CrystalHD doesn't report interlaced H.264 content in a way that allows
* us to distinguish between specific cases that require different handling.
* So, for now, we have to hard-code the behaviour we want.
*
* The default behaviour is to assume MBAFF with input and output fieldpairs.
*
* Define ASSUME_PAFF_OVER_MBAFF to treat input as PAFF with separate input
* and output fields.
*
* Define ASSUME_TWO_INPUTS_ONE_OUTPUT to treat input as separate fields but
* output as a single fieldpair.
*
* Define both to mess up your playback.
*/
#define ASSUME_PAFF_OVER_MBAFF 0
#define ASSUME_TWO_INPUTS_ONE_OUTPUT 0
static inline CopyRet copy_frame(AVCodecContext *avctx,
BC_DTS_PROC_OUT *output,
void *data, int *data_size,
uint8_t second_field)
{
BC_STATUS ret;
BC_DTS_STATUS decoder_status;
uint8_t is_paff;
uint8_t next_frame_same;
uint8_t interlaced;
CHDContext *priv = avctx->priv_data;
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;
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;
}
is_paff = ASSUME_PAFF_OVER_MBAFF ||
!(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC);
next_frame_same = output->PicInfo.picture_number ==
(decoder_status.picNumFlags & ~0x40000000);
interlaced = ((output->PicInfo.flags &
VDEC_FLAG_INTERLACED_SRC) && is_paff) ||
next_frame_same || bottom_field || second_field;
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: next_frame_same: %u | %u | %u\n",
next_frame_same, output->PicInfo.picture_number,
decoder_status.picNumFlags & ~0x40000000);
if (priv->pic.data[0] && !priv->need_second_field)
avctx->release_buffer(avctx, &priv->pic);
priv->need_second_field = interlaced && !priv->need_second_field;
priv->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
FF_BUFFER_HINTS_REUSABLE;
if (!priv->pic.data[0]) {
if (avctx->get_buffer(avctx, &priv->pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return RET_ERROR;
}
}
bwidth = av_image_get_linesize(avctx->pix_fmt, width, 0);
if (priv->is_70012) {
int pStride;
if (width <= 720)
pStride = 720;
else if (width <= 1280)
pStride = 1280;
else if (width <= 1080)
pStride = 1080;
sStride = av_image_get_linesize(avctx->pix_fmt, pStride, 0);
} else {
sStride = bwidth;
}
dStride = priv->pic.linesize[0];
dst = priv->pic.data[0];
av_log(priv->avctx, AV_LOG_VERBOSE, "CrystalHD: Copying out frame\n");
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);
if (interlaced)
dY++;
}
} else {
av_image_copy_plane(dst, dStride, src, sStride, bwidth, height);
}
priv->pic.interlaced_frame = interlaced;
if (interlaced)
priv->pic.top_field_first = !bottom_first;
if (output->PicInfo.timeStamp != 0) {
priv->pic.pkt_pts = opaque_list_pop(priv, output->PicInfo.timeStamp);
av_log(avctx, AV_LOG_VERBOSE, "output \"pts\": %"PRIu64"\n",
priv->pic.pkt_pts);
}
if (!priv->need_second_field) {
*data_size = sizeof(AVFrame);
*(AVFrame *)data = priv->pic;
}
if (ASSUME_TWO_INPUTS_ONE_OUTPUT &&
output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) {
av_log(priv->avctx, AV_LOG_VERBOSE, "Fieldpair from two packets.\n");
return RET_SKIP_NEXT_COPY;
}
return RET_OK;
}
static inline CopyRet receive_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t second_field)
{
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;
*data_size = 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;
return RET_COPY_AGAIN;
} else if (ret == BC_STS_SUCCESS) {
int copy_ret = -1;
if (output.PoutFlags & BC_POUT_FLAGS_PIB_VALID) {
if (priv->last_picture == -1) {
/*
* Init to one less, so that the incrementing code doesn't
* need to be special-cased.
*/
priv->last_picture = output.PicInfo.picture_number - 1;
}
if (avctx->codec->id == CODEC_ID_MPEG4 &&
output.PicInfo.timeStamp == 0) {
av_log(avctx, AV_LOG_VERBOSE,
"CrystalHD: Not returning packed frame twice.\n");
priv->last_picture++;
DtsReleaseOutputBuffs(dev, NULL, FALSE);
return RET_COPY_AGAIN;
}
print_frame_info(priv, &output);
if (priv->last_picture + 1 < output.PicInfo.picture_number) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: Picture Number discontinuity\n");
/*
* Have we lost frames? If so, we need to shrink the
* pipeline length appropriately.
*
* XXX: I have no idea what the semantics of this situation
* are so I don't even know if we've lost frames or which
* ones.
*
* In any case, only warn the first time.
*/
priv->last_picture = output.PicInfo.picture_number - 1;
}
copy_ret = copy_frame(avctx, &output, data, data_size, second_field);
if (*data_size > 0) {
avctx->has_b_frames--;
priv->last_picture++;
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Pipeline length: %u\n",
avctx->has_b_frames);
}
} else {
/*
* An invalid frame has been consumed.
*/
av_log(avctx, AV_LOG_ERROR, "CrystalHD: ProcOutput succeeded with "
"invalid PIB\n");
avctx->has_b_frames--;
copy_ret = RET_OK;
}
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 decode(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
BC_STATUS ret;
BC_DTS_STATUS decoder_status;
CopyRet rec_ret;
CHDContext *priv = avctx->priv_data;
HANDLE dev = priv->dev;
int len = avpkt->size;
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: decode_frame\n");
if (len) {
int32_t tx_free = (int32_t)DtsTxFreeSize(dev);
if (len < tx_free - 1024) {
/*
* 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.
*/
uint64_t pts = opaque_list_push(priv, avctx->pkt->pts);
if (!pts) {
return AVERROR(ENOMEM);
}
av_log(priv->avctx, AV_LOG_VERBOSE,
"input \"pts\": %"PRIu64"\n", pts);
ret = DtsProcInput(dev, avpkt->data, len, pts, 0);
if (ret == BC_STS_BUSY) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: ProcInput returned busy\n");
usleep(BASE_WAIT);
return AVERROR(EBUSY);
} else if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR,
"CrystalHD: ProcInput failed: %u\n", ret);
return -1;
}
avctx->has_b_frames++;
} else {
av_log(avctx, AV_LOG_WARNING, "CrystalHD: Input buffer full\n");
len = 0; // We didn't consume any bytes.
}
} else {
av_log(avctx, AV_LOG_INFO, "CrystalHD: No more input data\n");
}
if (priv->skip_next_output) {
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Skipping next output.\n");
priv->skip_next_output = 0;
avctx->has_b_frames--;
return len;
}
ret = DtsGetDriverStatus(dev, &decoder_status);
if (ret != BC_STS_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "CrystalHD: GetDriverStatus failed\n");
return -1;
}
/*
* No frames ready. Don't try to extract.
*
* Empirical testing shows that ReadyListCount can be a damn lie,
* and ProcOut still fails when count > 0. The same testing showed
* that two more iterations were needed before ProcOutput would
* succeed.
*/
if (priv->output_ready < 2) {
if (decoder_status.ReadyListCount != 0)
priv->output_ready++;
usleep(BASE_WAIT);
av_log(avctx, AV_LOG_INFO, "CrystalHD: Filling pipeline.\n");
return len;
} else if (decoder_status.ReadyListCount == 0) {
/*
* After the pipeline is established, if we encounter a lack of frames
* that probably means we're not giving the hardware enough time to
* decode them, so start increasing the wait time at the end of a
* decode call.
*/
usleep(BASE_WAIT);
priv->decode_wait += WAIT_UNIT;
av_log(avctx, AV_LOG_INFO, "CrystalHD: No frames ready. Returning\n");
return len;
}
do {
rec_ret = receive_frame(avctx, data, data_size, 0);
if (rec_ret == 0 && *data_size == 0) {
if (avctx->codec->id == CODEC_ID_H264) {
/*
* This case is for when the encoded fields are stored
* separately and we get a separate avpkt for each one. To keep
* the pipeline stable, we should return nothing and wait for
* the next time round to grab the second field.
* H.264 PAFF is an example of this.
*/
av_log(avctx, AV_LOG_VERBOSE, "Returning after first field.\n");
avctx->has_b_frames--;
} else {
/*
* This case is for when the encoded fields are stored in a
* single avpkt but the hardware returns then separately. Unless
* we grab the second field before returning, we'll slip another
* frame in the pipeline and if that happens a lot, we're sunk.
* So we have to get that second field now.
* Interlaced mpeg2 and vc1 are examples of this.
*/
av_log(avctx, AV_LOG_VERBOSE, "Trying to get second field.\n");
while (1) {
usleep(priv->decode_wait);
ret = DtsGetDriverStatus(dev, &decoder_status);
if (ret == BC_STS_SUCCESS &&
decoder_status.ReadyListCount > 0) {
rec_ret = receive_frame(avctx, data, data_size, 1);
if ((rec_ret == 0 && *data_size > 0) ||
rec_ret == RET_ERROR)
break;
}
}
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Got second field.\n");
}
} else if (rec_ret == RET_SKIP_NEXT_COPY) {
/*
* Two input packets got turned into a field pair. Gawd.
*/
av_log(avctx, AV_LOG_VERBOSE,
"Don't output on next decode call.\n");
priv->skip_next_output = 1;
}
/*
* If rec_ret == RET_COPY_AGAIN, that means that either we just handled
* a FMT_CHANGE event and need to go around again for the actual frame,
* we got a busy status and need to try again, or we're dealing with
* packed b-frames, where the hardware strangely returns the packed
* p-frame twice. We choose to keep the second copy as it carries the
* valid pts.
*/
} while (rec_ret == RET_COPY_AGAIN);
usleep(priv->decode_wait);
return len;
}
#if CONFIG_H264_CRYSTALHD_DECODER
AVCodec ff_h264_crystalhd_decoder = {
.name = "h264_crystalhd",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_H264,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (CrystalHD acceleration)"),
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
};
#endif
#if CONFIG_MPEG2_CRYSTALHD_DECODER
AVCodec ff_mpeg2_crystalhd_decoder = {
.name = "mpeg2_crystalhd",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_MPEG2VIDEO,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 Video (CrystalHD acceleration)"),
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
};
#endif
#if CONFIG_MPEG4_CRYSTALHD_DECODER
AVCodec ff_mpeg4_crystalhd_decoder = {
.name = "mpeg4_crystalhd",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_MPEG4,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 (CrystalHD acceleration)"),
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
};
#endif
#if CONFIG_MSMPEG4_CRYSTALHD_DECODER
AVCodec ff_msmpeg4_crystalhd_decoder = {
.name = "msmpeg4_crystalhd",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_MSMPEG4V3,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 Microsoft variant version 3 (CrystalHD acceleration)"),
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
};
#endif
#if CONFIG_VC1_CRYSTALHD_DECODER
AVCodec ff_vc1_crystalhd_decoder = {
.name = "vc1_crystalhd",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_VC1,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 (CrystalHD acceleration)"),
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
};
#endif
#if CONFIG_WMV3_CRYSTALHD_DECODER
AVCodec ff_wmv3_crystalhd_decoder = {
.name = "wmv3_crystalhd",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_WMV3,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 (CrystalHD acceleration)"),
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUYV422, PIX_FMT_NONE},
};
#endif
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