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FFmpeg/libavcodec/crystalhd.c

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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, 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 outputting
* 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 "h264.h"
#include "internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.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,
RET_COPY_NEXT_FIELD = 3,
} CopyRet;
typedef struct OpaqueList {
struct OpaqueList *next;
uint64_t fake_timestamp;
uint64_t reordered_opaque;
uint8_t pic_type;
} OpaqueList;
typedef struct {
AVClass *av_class;
AVCodecContext *avctx;
AVFrame *pic;
HANDLE dev;
uint8_t *orig_extradata;
uint32_t orig_extradata_size;
AVBitStreamFilterContext *bsfc;
AVCodecParserContext *parser;
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;
/* Options */
uint32_t sWidth;
uint8_t bframe_bug;
} 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 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,
uint8_t pic_type)
{
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;
newNode->pic_type = pic_type;
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;
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;
av_frame_unref (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);
/*
* Restore original extradata, so that if the decoder is
* reinitialised, the bitstream detection and filtering
* will work as expected.
*/
if (priv->orig_extradata) {
av_free(avctx->extradata);
avctx->extradata = priv->orig_extradata;
avctx->extradata_size = priv->orig_extradata_size;
priv->orig_extradata = NULL;
priv->orig_extradata_size = 0;
}
av_parser_close(priv->parser);
if (priv->bsfc) {
av_bitstream_filter_close(priv->bsfc);
}
av_free(priv->sps_pps_buf);
av_frame_free (&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 = AV_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;
priv->pic = av_frame_alloc();
subtype = id2subtype(priv, avctx->codec->id);
switch (subtype) {
case BC_MSUBTYPE_AVC1:
{
uint8_t *dummy_p;
int dummy_int;
/* Back up the extradata so it can be restored at close time. */
priv->orig_extradata = av_malloc(avctx->extradata_size);
if (!priv->orig_extradata) {
av_log(avctx, AV_LOG_ERROR,
"Failed to allocate copy of extradata\n");
return AVERROR(ENOMEM);
}
priv->orig_extradata_size = avctx->extradata_size;
memcpy(priv->orig_extradata, avctx->extradata, avctx->extradata_size);
priv->bsfc = av_bitstream_filter_init("h264_mp4toannexb");
if (!priv->bsfc) {
av_log(avctx, AV_LOG_ERROR,
"Cannot open the h264_mp4toannexb BSF!\n");
return AVERROR_BSF_NOT_FOUND;
}
av_bitstream_filter_filter(priv->bsfc, avctx, NULL, &dummy_p,
&dummy_int, NULL, 0, 0);
}
subtype = BC_MSUBTYPE_H264;
// Fall-through
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;
}
if (avctx->codec->id == AV_CODEC_ID_H264) {
priv->parser = av_parser_init(avctx->codec->id);
if (!priv->parser)
av_log(avctx, AV_LOG_WARNING,
"Cannot open the h.264 parser! Interlaced h.264 content "
"will not be detected reliably.\n");
priv->parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
}
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,
void *data, int *got_frame)
{
BC_STATUS ret;
BC_DTS_STATUS decoder_status = { 0, };
uint8_t trust_interlaced;
uint8_t interlaced;
CHDContext *priv = avctx->priv_data;
int64_t pkt_pts = AV_NOPTS_VALUE;
uint8_t pic_type = 0;
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;
pic_type = node->pic_type;
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. To keep subsequent calculations
* simple, pic_type should be set a FIELD value - doesn't
* matter which, but I chose BOTTOM.
*/
pic_type = PICT_BOTTOM_FIELD;
}
av_log(avctx, AV_LOG_VERBOSE, "output \"pts\": %"PRIu64"\n",
output->PicInfo.timeStamp);
av_log(avctx, AV_LOG_VERBOSE, "output picture type %d\n",
pic_type);
}
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;
}
/*
* For most content, we can trust the interlaced flag returned
* by the hardware, but sometimes we can't. These are the
* conditions under which we can trust the flag:
*
* 1) It's not h.264 content
* 2) The UNKNOWN_SRC flag is not set
* 3) We know we're expecting a second field
* 4) The hardware reports this picture and the next picture
* have the same picture number.
*
* Note that there can still be interlaced content that will
* fail this check, if the hardware hasn't decoded the next
* picture or if there is a corruption in the stream. (In either
* case a 0 will be returned for the next picture number)
*/
trust_interlaced = avctx->codec->id != AV_CODEC_ID_H264 ||
!(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) ||
priv->need_second_field ||
(decoder_status.picNumFlags & ~0x40000000) ==
output->PicInfo.picture_number;
/*
* If we got a false negative for trust_interlaced on the first field,
* we will realise our mistake here when we see that the picture number is that
* of the previous picture. We cannot recover the frame and should discard the
* second field to keep the correct number of output frames.
*/
if (output->PicInfo.picture_number == priv->last_picture && !priv->need_second_field) {
av_log(avctx, AV_LOG_WARNING,
"Incorrectly guessed progressive frame. Discarding second field\n");
/* Returning without providing a picture. */
return RET_OK;
}
interlaced = (output->PicInfo.flags & VDEC_FLAG_INTERLACED_SRC) &&
trust_interlaced;
if (!trust_interlaced && (decoder_status.picNumFlags & ~0x40000000) == 0) {
av_log(avctx, AV_LOG_VERBOSE,
"Next picture number unknown. Assuming progressive frame.\n");
}
av_log(avctx, AV_LOG_VERBOSE, "Interlaced state: %d | trust_interlaced %d\n",
interlaced, trust_interlaced);
if (priv->pic->data[0] && !priv->need_second_field)
av_frame_unref(priv->pic);
priv->need_second_field = interlaced && !priv->need_second_field;
if (!priv->pic->data[0]) {
if (ff_get_buffer(avctx, priv->pic, AV_GET_BUFFER_FLAG_REF) < 0)
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 pStride = 1920;
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);
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;
priv->pic->pkt_pts = pkt_pts;
if (!priv->need_second_field) {
*got_frame = 1;
if ((ret = av_frame_ref(data, priv->pic)) < 0) {
return ret;
}
}
/*
* Two types of PAFF content have been observed. One form causes the
* hardware to return a field pair and the other individual fields,
* even though the input is always individual fields. We must skip
* copying on the next decode() call to maintain pipeline length in
* the first case.
*/
if (!interlaced && (output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) &&
(pic_type == PICT_TOP_FIELD || pic_type == PICT_BOTTOM_FIELD)) {
av_log(priv->avctx, AV_LOG_VERBOSE, "Fieldpair from two packets.\n");
return RET_SKIP_NEXT_COPY;
}
/*
* The logic here is purely based on empirical testing with samples.
* If we need a second field, it could come from a second input packet,
* or it could come from the same field-pair input packet at the current
* field. In the first case, we should return and wait for the next time
* round to get the second field, while in the second case, we should
* ask the decoder for it immediately.
*
* Testing has shown that we are dealing with the fieldpair -> two fields
* case if the VDEC_FLAG_UNKNOWN_SRC is not set or if the input picture
* type was PICT_FRAME (in this second case, the flag might still be set)
*/
return priv->need_second_field &&
(!(output->PicInfo.flags & VDEC_FLAG_UNKNOWN_SRC) ||
pic_type == PICT_FRAME) ?
RET_COPY_NEXT_FIELD : RET_OK;
}
static inline CopyRet receive_frame(AVCodecContext *avctx,
void *data, 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) {
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 == AV_CODEC_ID_MPEG4 &&
output.PicInfo.timeStamp == 0 && priv->bframe_bug) {
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, got_frame);
if (*got_frame > 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 *got_frame, AVPacket *avpkt)
{
BC_STATUS ret;
BC_DTS_STATUS decoder_status = { 0, };
CopyRet rec_ret;
CHDContext *priv = avctx->priv_data;
HANDLE dev = priv->dev;
uint8_t *in_data = avpkt->data;
int len = avpkt->size;
int free_data = 0;
uint8_t pic_type = 0;
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: decode_frame\n");
if (avpkt->size == 7 && !priv->bframe_bug) {
/*
* The use of a drop frame triggers the bug
*/
av_log(avctx, AV_LOG_INFO,
"CrystalHD: Enabling work-around for packed b-frame bug\n");
priv->bframe_bug = 1;
} else if (avpkt->size == 8 && priv->bframe_bug) {
/*
* Delay frames don't trigger the bug
*/
av_log(avctx, AV_LOG_INFO,
"CrystalHD: Disabling work-around for packed b-frame bug\n");
priv->bframe_bug = 0;
}
if (len) {
int32_t tx_free = (int32_t)DtsTxFreeSize(dev);
if (priv->parser) {
int ret = 0;
if (priv->bsfc) {
ret = av_bitstream_filter_filter(priv->bsfc, avctx, NULL,
&in_data, &len,
avpkt->data, len, 0);
}
free_data = ret > 0;
if (ret >= 0) {
uint8_t *pout;
int psize;
int index;
H264Context *h = priv->parser->priv_data;
index = av_parser_parse2(priv->parser, avctx, &pout, &psize,
in_data, len, avctx->pkt->pts,
avctx->pkt->dts, 0);
if (index < 0) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: Failed to parse h.264 packet to "
"detect interlacing.\n");
} else if (index != len) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: Failed to parse h.264 packet "
"completely. Interlaced frames may be "
"incorrectly detected.\n");
} else {
av_log(avctx, AV_LOG_VERBOSE,
"CrystalHD: parser picture type %d\n",
h->picture_structure);
pic_type = h->picture_structure;
}
} else {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: mp4toannexb filter failed to filter "
"packet. Interlaced frames may be incorrectly "
"detected.\n");
}
}
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, pic_type);
if (!pts) {
if (free_data) {
av_freep(&in_data);
}
return AVERROR(ENOMEM);
}
av_log(priv->avctx, AV_LOG_VERBOSE,
"input \"pts\": %"PRIu64"\n", pts);
ret = DtsProcInput(dev, in_data, len, pts, 0);
if (free_data) {
av_freep(&in_data);
}
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, got_frame);
if (rec_ret == RET_OK && *got_frame == 0) {
/*
* 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 if (rec_ret == RET_COPY_NEXT_FIELD) {
/*
* 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, got_frame);
if ((rec_ret == RET_OK && *got_frame > 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
static AVClass h264_class = {
"h264_crystalhd",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_h264_crystalhd_decoder = {
.name = "h264_crystalhd",
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (CrystalHD acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush = flush,
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE},
.priv_class = &h264_class,
};
#endif
#if CONFIG_MPEG2_CRYSTALHD_DECODER
static AVClass mpeg2_class = {
"mpeg2_crystalhd",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_mpeg2_crystalhd_decoder = {
.name = "mpeg2_crystalhd",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 Video (CrystalHD acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG2VIDEO,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush = flush,
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE},
.priv_class = &mpeg2_class,
};
#endif
#if CONFIG_MPEG4_CRYSTALHD_DECODER
static AVClass mpeg4_class = {
"mpeg4_crystalhd",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_mpeg4_crystalhd_decoder = {
.name = "mpeg4_crystalhd",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 (CrystalHD acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush = flush,
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE},
.priv_class = &mpeg4_class,
};
#endif
#if CONFIG_MSMPEG4_CRYSTALHD_DECODER
static AVClass msmpeg4_class = {
"msmpeg4_crystalhd",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_msmpeg4_crystalhd_decoder = {
.name = "msmpeg4_crystalhd",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Part 2 Microsoft variant version 3 (CrystalHD acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_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,
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE},
.priv_class = &msmpeg4_class,
};
#endif
#if CONFIG_VC1_CRYSTALHD_DECODER
static AVClass vc1_class = {
"vc1_crystalhd",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_vc1_crystalhd_decoder = {
.name = "vc1_crystalhd",
.long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 (CrystalHD acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VC1,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush = flush,
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE},
.priv_class = &vc1_class,
};
#endif
#if CONFIG_WMV3_CRYSTALHD_DECODER
static AVClass wmv3_class = {
"wmv3_crystalhd",
av_default_item_name,
options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_wmv3_crystalhd_decoder = {
.name = "wmv3_crystalhd",
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 (CrystalHD acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_WMV3,
.priv_data_size = sizeof(CHDContext),
.init = init,
.close = uninit,
.decode = decode,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush = flush,
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE},
.priv_class = &wmv3_class,
};
#endif