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8751a0e261
mpv/video/decode/vd_lavc.c
wm4 8751a0e261 video: decouple internal pixel formats from FourCCs 
mplayer's video chain traditionally used FourCCs for pixel formats. For
example, it used IMGFMT_YV12 for 4:2:0 YUV, which was defined to the
string 'YV12' interpreted as unsigned int. Additionally, it used to
encode information into the numeric values of some formats. The RGB
formats had their bit depth and endian encoded into the least
significant byte. Extended planar formats (420P10 etc.) had chroma
shift, endian, and component bit depth encoded. (This has been removed
in recent commits.)

Replace the FourCC mess with a simple enum. Remove all the redundant
formats like YV12/I420/IYUV. Replace some image format names by
something more intuitive, most importantly IMGFMT_YV12 -> IMGFMT_420P.

Add img_fourcc.h, which contains the old IDs for code that actually uses
FourCCs. Change the way demuxers, that output raw video, identify the
video format: they set either MP_FOURCC_RAWVIDEO or MP_FOURCC_IMGFMT to
request the rawvideo decoder, and sh_video->imgfmt specifies the pixel
format. Like the previous hack, this is supposed to avoid the need for
a complete codecs.cfg entry per format, or other lookup tables. (Note
that the RGB raw video FourCCs mostly rely on ffmpeg's mappings for NUT
raw video, but this is still considered better than adding a raw video
decoder - even if trivial, it would be full of annoying lookup tables.)

The TV code has not been tested.

Some corrective changes regarding endian and other image format flags
creep in.
2013-01-13 20:04:11 +01:00

812 lines
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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <time.h>
#include <stdbool.h>
#include <sys/types.h>
#include <libavutil/common.h>
#include <libavutil/opt.h>
#include <libavutil/intreadwrite.h>
#include <libavutil/pixdesc.h>
#include "compat/libav.h"
#include "talloc.h"
#include "config.h"
#include "core/mp_msg.h"
#include "core/options.h"
#include "core/av_opts.h"
#include "compat/mpbswap.h"
#include "video/fmt-conversion.h"
#include "vd.h"
#include "video/img_format.h"
#include "video/mp_image_pool.h"
#include "video/filter/vf.h"
#include "demux/stheader.h"
#include "demux/demux_packet.h"
#include "core/codec-cfg.h"
#include "osdep/numcores.h"
#include "video/csputils.h"
static const vd_info_t info = {
"libavcodec video codecs",
"ffmpeg",
"",
"",
"native codecs",
.print_name = "libavcodec",
};
#include "libavcodec/avcodec.h"
#include "lavc.h"
#if AVPALETTE_SIZE != MP_PALETTE_SIZE
#error palette too large, adapt video/mp_image.h:MP_PALETTE_SIZE
#endif
#include "core/m_option.h"
static int init_avctx(sh_video_t *sh, AVCodec *lavc_codec, struct hwdec *hwdec);
static void uninit_avctx(sh_video_t *sh);
static int get_buffer_hwdec(AVCodecContext *avctx, AVFrame *pic);
static void release_buffer_hwdec(AVCodecContext *avctx, AVFrame *pic);
static void draw_slice_hwdec(struct AVCodecContext *s, const AVFrame *src,
int offset[4], int y, int type, int height);
static enum PixelFormat get_format_hwdec(struct AVCodecContext *avctx,
const enum PixelFormat *pix_fmt);
static void uninit(struct sh_video *sh);
const m_option_t lavc_decode_opts_conf[] = {
OPT_INTRANGE("bug", lavc_param.workaround_bugs, 0, -1, 999999),
OPT_FLAG_ON("gray", lavc_param.gray, 0),
OPT_INTRANGE("idct", lavc_param.idct_algo, 0, 0, 99),
OPT_INTRANGE("ec", lavc_param.error_concealment, 0, 0, 99),
OPT_FLAG_ON("vstats", lavc_param.vstats, 0),
OPT_INTRANGE("debug", lavc_param.debug, 0, 0, 9999999),
OPT_INTRANGE("vismv", lavc_param.vismv, 0, 0, 9999999),
OPT_INTRANGE("st", lavc_param.skip_top, 0, 0, 999),
OPT_INTRANGE("sb", lavc_param.skip_bottom, 0, 0, 999),
OPT_FLAG_CONSTANTS("fast", lavc_param.fast, 0, 0, CODEC_FLAG2_FAST),
OPT_STRING("lowres", lavc_param.lowres_str, 0),
OPT_STRING("skiploopfilter", lavc_param.skip_loop_filter_str, 0),
OPT_STRING("skipidct", lavc_param.skip_idct_str, 0),
OPT_STRING("skipframe", lavc_param.skip_frame_str, 0),
OPT_INTRANGE("threads", lavc_param.threads, 0, 0, 16),
OPT_FLAG_CONSTANTS("bitexact", lavc_param.bitexact, 0, 0, CODEC_FLAG_BITEXACT),
OPT_STRING("o", lavc_param.avopt, 0),
{NULL, NULL, 0, 0, 0, 0, NULL}
};
// keep in sync with --hwdec option
enum hwdec_type {
HWDEC_NONE = 0,
HWDEC_VDPAU = 1,
HWDEC_VDA = 2,
HWDEC_CRYSTALHD = 3,
};
struct hwdec {
enum hwdec_type api;
char *codec, *hw_codec;
};
static const struct hwdec hwdec[] = {
{HWDEC_VDPAU, "h264", "h264_vdpau"},
{HWDEC_VDPAU, "wmv3", "wmv3_vdpau"},
{HWDEC_VDPAU, "vc1", "vc1_vdpau"},
{HWDEC_VDPAU, "mpegvideo", "mpegvideo_vdpau"},
{HWDEC_VDPAU, "mpeg1video", "mpeg1video_vdpau"},
{HWDEC_VDPAU, "mpeg2video", "mpegvideo_vdpau"},
{HWDEC_VDPAU, "mpeg2", "mpeg2_vdpau"},
{HWDEC_VDPAU, "mpeg4", "mpeg4_vdpau"},
{HWDEC_VDA, "h264", "h264_vda"},
{HWDEC_CRYSTALHD, "mpeg2", "mpeg2_crystalhd"},
{HWDEC_CRYSTALHD, "msmpeg4", "msmpeg4_crystalhd"},
{HWDEC_CRYSTALHD, "wmv3", "wmv3_crystalhd"},
{HWDEC_CRYSTALHD, "vc1", "vc1_crystalhd"},
{HWDEC_CRYSTALHD, "h264", "h264_crystalhd"},
{HWDEC_CRYSTALHD, "mpeg4", "mpeg4_crystalhd"},
{0}
};
static struct hwdec *find_hwcodec(enum hwdec_type api, const char *codec)
{
for (int n = 0; hwdec[n].api; n++) {
if (hwdec[n].api == api && strcmp(hwdec[n].codec, codec) == 0)
return (struct hwdec *)&hwdec[n];
}
return NULL;
}
// print debugging stats into a file
static void print_vstats(sh_video_t *sh, int len)
{
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
struct lavc_param *lavc_param = &sh->opts->lavc_param;
if (!lavc_param->vstats)
return;
static FILE *fvstats = NULL;
char filename[20];
static long long int all_len = 0;
static int frame_number = 0;
static double all_frametime = 0.0;
AVFrame *pic = avctx->coded_frame;
double quality = 0.0;
if (!pic)
return;
if (!fvstats) {
time_t today2;
struct tm *today;
today2 = time(NULL);
today = localtime(&today2);
sprintf(filename, "vstats_%02d%02d%02d.log", today->tm_hour,
today->tm_min, today->tm_sec);
fvstats = fopen(filename, "w");
if (!fvstats) {
perror("fopen");
lavc_param->vstats = 0; // disable block
return;
/*exit(1);*/
}
}
// average MB quantizer
{
int x, y;
int w = ((avctx->width << avctx->lowres) + 15) >> 4;
int h = ((avctx->height << avctx->lowres) + 15) >> 4;
int8_t *q = pic->qscale_table;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++)
quality += (double)*(q + x);
q += pic->qstride;
}
quality /= w * h;
}
all_len += len;
all_frametime += sh->frametime;
fprintf(fvstats, "frame= %5d q= %2.2f f_size= %6d s_size= %8.0fkB ",
++frame_number, quality, len, (double)all_len / 1024);
fprintf(fvstats, "time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
all_frametime, (double)(len * 8) / sh->frametime / 1000.0,
(double)(all_len * 8) / all_frametime / 1000.0);
switch (pic->pict_type) {
case AV_PICTURE_TYPE_I:
fprintf(fvstats, "type= I\n");
break;
case AV_PICTURE_TYPE_P:
fprintf(fvstats, "type= P\n");
break;
case AV_PICTURE_TYPE_S:
fprintf(fvstats, "type= S\n");
break;
case AV_PICTURE_TYPE_B:
fprintf(fvstats, "type= B\n");
break;
default:
fprintf(fvstats, "type= ? (%d)\n", pic->pict_type);
break;
}
ctx->qp_stat[(int)(quality + 0.5)]++;
ctx->qp_sum += quality;
ctx->inv_qp_sum += 1.0 / (double)quality;
}
static enum AVDiscard str2AVDiscard(char *str)
{
if (!str) return AVDISCARD_DEFAULT;
if (strcasecmp(str, "none" ) == 0) return AVDISCARD_NONE;
if (strcasecmp(str, "default") == 0) return AVDISCARD_DEFAULT;
if (strcasecmp(str, "nonref" ) == 0) return AVDISCARD_NONREF;
if (strcasecmp(str, "bidir" ) == 0) return AVDISCARD_BIDIR;
if (strcasecmp(str, "nonkey" ) == 0) return AVDISCARD_NONKEY;
if (strcasecmp(str, "all" ) == 0) return AVDISCARD_ALL;
mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Unknown discard value %s\n", str);
return AVDISCARD_DEFAULT;
}
static int init(sh_video_t *sh)
{
vd_ffmpeg_ctx *ctx;
AVCodec *lavc_codec = NULL;
ctx = sh->context = talloc_zero(NULL, vd_ffmpeg_ctx);
ctx->non_dr1_pool = talloc_steal(ctx, mp_image_pool_new(16));
if (sh->codec->dll) {
lavc_codec = avcodec_find_decoder_by_name(sh->codec->dll);
if (!lavc_codec) {
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR,
"Cannot find codec '%s' in libavcodec...\n",
sh->codec->dll);
uninit(sh);
return 0;
}
} else if (sh->libav_codec_id) {
lavc_codec = avcodec_find_decoder(sh->libav_codec_id);
if (!lavc_codec) {
mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "Libavcodec has no decoder "
"for this codec\n");
uninit(sh);
return 0;
}
}
if (!lavc_codec) {
uninit(sh);
return 0;
}
struct hwdec *hwdec = find_hwcodec(sh->opts->hwdec_api, lavc_codec->name);
if (hwdec) {
AVCodec *lavc_hwcodec = avcodec_find_decoder_by_name(hwdec->hw_codec);
if (lavc_hwcodec) {
ctx->software_fallback = lavc_codec;
lavc_codec = lavc_hwcodec;
} else {
hwdec = NULL;
mp_tmsg(MSGT_DECVIDEO, MSGL_WARN, "Using software decoding.\n");
}
}
if (!init_avctx(sh, lavc_codec, hwdec)) {
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Error initializing hardware "
"decoding, falling back to software decoding.\n");
lavc_codec = ctx->software_fallback;
ctx->software_fallback = NULL;
if (!init_avctx(sh, lavc_codec, NULL)) {
uninit(sh);
return 0;
}
}
return 1;
}
static int init_avctx(sh_video_t *sh, AVCodec *lavc_codec, struct hwdec *hwdec)
{
vd_ffmpeg_ctx *ctx = sh->context;
struct lavc_param *lavc_param = &sh->opts->lavc_param;
sh->codecname = lavc_codec->long_name;
if (!sh->codecname)
sh->codecname = lavc_codec->name;
ctx->do_dr1 = ctx->do_hw_dr1 = 0;
ctx->pix_fmt = PIX_FMT_NONE;
ctx->vo_initialized = 0;
ctx->hwdec = hwdec;
ctx->pic = avcodec_alloc_frame();
ctx->avctx = avcodec_alloc_context3(lavc_codec);
AVCodecContext *avctx = ctx->avctx;
avctx->opaque = sh;
avctx->codec_type = AVMEDIA_TYPE_VIDEO;
avctx->codec_id = lavc_codec->id;
avctx->thread_count = lavc_param->threads;
if (ctx->hwdec && ctx->hwdec->api == HWDEC_VDPAU) {
assert(lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU);
ctx->do_hw_dr1 = true;
avctx->thread_count = 1;
avctx->get_format = get_format_hwdec;
avctx->get_buffer = get_buffer_hwdec;
avctx->release_buffer = release_buffer_hwdec;
if (ctx->hwdec->api == HWDEC_VDPAU) {
avctx->draw_horiz_band = draw_slice_hwdec;
avctx->slice_flags =
SLICE_FLAG_CODED_ORDER | SLICE_FLAG_ALLOW_FIELD;
}
} else if (lavc_codec->capabilities & CODEC_CAP_DR1) {
ctx->do_dr1 = true;
avctx->get_buffer = mp_codec_get_buffer;
avctx->release_buffer = mp_codec_release_buffer;
}
if (avctx->thread_count == 0) {
int threads = default_thread_count();
if (threads < 1) {
mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[VD_FFMPEG] Could not determine "
"thread count to use, defaulting to 1.\n");
threads = 1;
}
threads = FFMIN(threads, 16);
avctx->thread_count = threads;
}
avctx->flags |= lavc_param->bitexact;
avctx->coded_width = sh->disp_w;
avctx->coded_height = sh->disp_h;
avctx->workaround_bugs = lavc_param->workaround_bugs;
if (lavc_param->gray)
avctx->flags |= CODEC_FLAG_GRAY;
avctx->flags2 |= lavc_param->fast;
avctx->codec_tag = sh->format;
if (sh->gsh->lavf_codec_tag)
avctx->codec_tag = sh->gsh->lavf_codec_tag;
avctx->stream_codec_tag = sh->video.fccHandler;
avctx->idct_algo = lavc_param->idct_algo;
avctx->error_concealment = lavc_param->error_concealment;
avctx->debug = lavc_param->debug;
if (lavc_param->debug)
av_log_set_level(AV_LOG_DEBUG);
avctx->debug_mv = lavc_param->vismv;
avctx->skip_top = lavc_param->skip_top;
avctx->skip_bottom = lavc_param->skip_bottom;
if (lavc_param->lowres_str != NULL) {
int lowres, lowres_w;
sscanf(lavc_param->lowres_str, "%d,%d", &lowres, &lowres_w);
if (lowres < 1 || lowres > 16 ||
lowres_w > 0 && avctx->width < lowres_w)
lowres = 0;
avctx->lowres = lowres;
}
avctx->skip_loop_filter = str2AVDiscard(lavc_param->skip_loop_filter_str);
avctx->skip_idct = str2AVDiscard(lavc_param->skip_idct_str);
avctx->skip_frame = str2AVDiscard(lavc_param->skip_frame_str);
if (lavc_param->avopt) {
if (parse_avopts(avctx, lavc_param->avopt) < 0) {
mp_msg(MSGT_DECVIDEO, MSGL_ERR,
"Your options /%s/ look like gibberish to me pal\n",
lavc_param->avopt);
uninit(sh);
return 0;
}
}
// Do this after the above avopt handling in case it changes values
ctx->skip_frame = avctx->skip_frame;
mp_dbg(MSGT_DECVIDEO, MSGL_DBG2,
"libavcodec.size: %d x %d\n", avctx->width, avctx->height);
switch (sh->format) {
case mmioFOURCC('S','V','Q','3'):
case mmioFOURCC('A','V','R','n'):
case mmioFOURCC('M','J','P','G'):
/* AVRn stores huffman table in AVI header */
/* Pegasus MJPEG stores it also in AVI header, but it uses the common
* MJPG fourcc :( */
if (!sh->bih || sh->bih->biSize <= sizeof(*sh->bih))
break;
av_opt_set_int(avctx, "extern_huff", 1, AV_OPT_SEARCH_CHILDREN);
avctx->extradata_size = sh->bih->biSize - sizeof(*sh->bih);
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(avctx->extradata, sh->bih + 1, avctx->extradata_size);
break;
case mmioFOURCC('R','V','1','0'):
case mmioFOURCC('R','V','1','3'):
case mmioFOURCC('R','V','2','0'):
case mmioFOURCC('R','V','3','0'):
case mmioFOURCC('R','V','4','0'):
if (sh->bih->biSize < sizeof(*sh->bih) + 8) {
// only 1 packet per frame & sub_id from fourcc
avctx->extradata_size = 8;
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
((uint32_t *)avctx->extradata)[0] = 0;
((uint32_t *)avctx->extradata)[1] =
sh->format == mmioFOURCC('R','V','1','3') ?
0x10003001 : 0x10000000;
} else {
// has extra slice header (demux_rm or rm->avi streamcopy)
avctx->extradata_size = sh->bih->biSize - sizeof(*sh->bih);
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(avctx->extradata, sh->bih + 1, avctx->extradata_size);
}
break;
case MKTAG('M', 'P', 'v', 'f'):
avctx->codec_tag = 0;
avctx->pix_fmt = imgfmt2pixfmt(sh->imgfmt);
break;
case MKTAG('M', 'P', 'r', 'v'):
avctx->codec_tag = sh->imgfmt;
break;
default:
if (!sh->bih || sh->bih->biSize <= sizeof(*sh->bih))
break;
avctx->extradata_size = sh->bih->biSize - sizeof(*sh->bih);
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(avctx->extradata, sh->bih + 1, avctx->extradata_size);
break;
}
if (sh->bih)
avctx->bits_per_coded_sample = sh->bih->biBitCount;
/* open it */
if (avcodec_open2(avctx, lavc_codec, NULL) < 0) {
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not open codec.\n");
uninit_avctx(sh);
return 0;
}
return 1;
}
static void uninit_avctx(sh_video_t *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
sh->codecname = NULL;
if (avctx) {
if (avctx->codec && avcodec_close(avctx) < 0)
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not close codec.\n");
av_freep(&avctx->extradata);
av_freep(&avctx->slice_offset);
}
av_freep(&avctx);
avcodec_free_frame(&ctx->pic);
mp_buffer_pool_free(&ctx->dr1_buffer_pool);
}
static void uninit(sh_video_t *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
if (avctx && sh->opts->lavc_param.vstats && avctx->coded_frame) {
for (int i = 1; i < 32; i++)
mp_msg(MSGT_DECVIDEO, MSGL_INFO,
"QP: %d, count: %d\n", i, ctx->qp_stat[i]);
mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] Arithmetic mean of QP: "
"%2.4f, Harmonic mean of QP: %2.4f\n",
ctx->qp_sum / avctx->coded_frame->coded_picture_number,
1.0 / (ctx->inv_qp_sum / avctx->coded_frame->coded_picture_number));
}
uninit_avctx(sh);
talloc_free(ctx);
}
static int init_vo(sh_video_t *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
int width = avctx->width;
int height = avctx->height;
float aspect = av_q2d(avctx->sample_aspect_ratio) * width / height;
/* Reconfiguring filter/VO chain may invalidate direct rendering buffers
* we have allocated for libavcodec (including the VDPAU HW decoding
* case). Is it guaranteed that the code below only triggers in a situation
* with no busy direct rendering buffers for reference frames?
*/
if (av_cmp_q(avctx->sample_aspect_ratio, ctx->last_sample_aspect_ratio) ||
width != sh->disp_w || height != sh->disp_h ||
avctx->pix_fmt != ctx->pix_fmt || !ctx->vo_initialized)
{
mp_image_pool_clear(ctx->non_dr1_pool);
ctx->vo_initialized = 0;
mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", aspect);
// Do not overwrite s->aspect on the first call, so that a container
// aspect if available is preferred.
// But set it even if the sample aspect did not change, since a
// resolution change can cause an aspect change even if the
// _sample_ aspect is unchanged.
if (sh->aspect == 0 || ctx->last_sample_aspect_ratio.den)
sh->aspect = aspect;
ctx->last_sample_aspect_ratio = avctx->sample_aspect_ratio;
sh->disp_w = width;
sh->disp_h = height;
ctx->pix_fmt = avctx->pix_fmt;
ctx->best_csp = pixfmt2imgfmt(avctx->pix_fmt);
sh->colorspace = avcol_spc_to_mp_csp(avctx->colorspace);
sh->color_range = avcol_range_to_mp_csp_levels(avctx->color_range);
if (!mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, ctx->best_csp))
return -1;
ctx->vo_initialized = 1;
}
return 0;
}
static enum PixelFormat get_format_hwdec(struct AVCodecContext *avctx,
const enum PixelFormat *fmt)
{
sh_video_t *sh = avctx->opaque;
vd_ffmpeg_ctx *ctx = sh->context;
mp_msg(MSGT_DECVIDEO, MSGL_V, "Pixel formats supported by decoder:");
for (int i = 0; fmt[i] != PIX_FMT_NONE; i++)
mp_msg(MSGT_DECVIDEO, MSGL_V, " %s", av_get_pix_fmt_name(fmt[i]));
mp_msg(MSGT_DECVIDEO, MSGL_V, "\n");
assert(ctx->hwdec);
for (int i = 0; fmt[i] != PIX_FMT_NONE; i++) {
int imgfmt = pixfmt2imgfmt(fmt[i]);
if (ctx->hwdec->api == HWDEC_VDPAU && IMGFMT_IS_VDPAU(imgfmt))
return fmt[i];
}
return PIX_FMT_NONE;
}
static void draw_slice_hwdec(struct AVCodecContext *s,
const AVFrame *src, int offset[4],
int y, int type, int height)
{
sh_video_t *sh = s->opaque;
struct vf_instance *vf = sh->vfilter;
void *state_ptr = src->data[0];
vf->control(vf, VFCTRL_HWDEC_DECODER_RENDER, state_ptr);
}
static int get_buffer_hwdec(AVCodecContext *avctx, AVFrame *pic)
{
sh_video_t *sh = avctx->opaque;
vd_ffmpeg_ctx *ctx = sh->context;
/* Decoders using ffmpeg's hwaccel architecture (everything except vdpau)
* can fall back to software decoding automatically. However, we don't
* want that: multithreading was already disabled. ffmpeg's fallback
* isn't really useful, and causes more trouble than it helps.
*
* Instead of trying to "adjust" the thread_count fields in avctx, let
* decoding fail hard. Then decode_with_fallback() will do our own software
* fallback. Fully reinitializing the decoder is saner, and will probably
* save us from other weird corner cases, like having to "reroute" the
* get_buffer callback.
*/
int imgfmt = pixfmt2imgfmt(avctx->pix_fmt);
if (!IMGFMT_IS_HWACCEL(imgfmt))
return -1;
if (init_vo(sh) < 0)
return -1;
assert(IMGFMT_IS_HWACCEL(ctx->best_csp));
struct mp_image *mpi = NULL;
struct vf_instance *vf = sh->vfilter;
vf->control(vf, VFCTRL_HWDEC_ALLOC_SURFACE, &mpi);
if (!mpi)
return -1;
for (int i = 0; i < 4; i++)
pic->data[i] = mpi->planes[i];
pic->opaque = mpi;
pic->type = FF_BUFFER_TYPE_USER;
/* The libavcodec reordered_opaque functionality is implemented by
* a similar copy in avcodec_default_get_buffer() and without a
* workaround like this it'd stop working when a custom buffer
* callback is used.
*/
pic->reordered_opaque = avctx->reordered_opaque;
return 0;
}
static void release_buffer_hwdec(AVCodecContext *avctx, AVFrame *pic)
{
mp_image_t *mpi = pic->opaque;
assert(pic->type == FF_BUFFER_TYPE_USER);
assert(mpi);
talloc_free(mpi);
for (int i = 0; i < 4; i++)
pic->data[i] = NULL;
}
static void fb_ref(void *b)
{
mp_buffer_ref(b);
}
static void fb_unref(void *b)
{
mp_buffer_unref(b);
}
static bool fb_is_unique(void *b)
{
return mp_buffer_is_unique(b);
}
static int decode(struct sh_video *sh, struct demux_packet *packet, void *data,
int len, int flags, double *reordered_pts,
struct mp_image **out_image)
{
int got_picture = 0;
int ret;
vd_ffmpeg_ctx *ctx = sh->context;
AVFrame *pic = ctx->pic;
AVCodecContext *avctx = ctx->avctx;
AVPacket pkt;
if (flags & 2)
avctx->skip_frame = AVDISCARD_ALL;
else if (flags & 1)
avctx->skip_frame = AVDISCARD_NONREF;
else
avctx->skip_frame = ctx->skip_frame;
av_init_packet(&pkt);
pkt.data = data;
pkt.size = len;
/* Some codecs (ZeroCodec, some cases of PNG) may want keyframe info
* from demuxer. */
if (packet && packet->keyframe)
pkt.flags |= AV_PKT_FLAG_KEY;
if (packet && packet->avpacket) {
pkt.side_data = packet->avpacket->side_data;
pkt.side_data_elems = packet->avpacket->side_data_elems;
}
// The avcodec opaque field stupidly supports only int64_t type
union pts { int64_t i; double d; };
avctx->reordered_opaque = (union pts){.d = *reordered_pts}.i;
ret = avcodec_decode_video2(avctx, pic, &got_picture, &pkt);
if (ret < 0) {
mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Error while decoding frame!\n");
return -1;
}
*reordered_pts = (union pts){.i = pic->reordered_opaque}.d;
print_vstats(sh, len);
if (!got_picture)
return 0; // skipped image
if (init_vo(sh) < 0)
return -1;
struct mp_image *mpi = NULL;
if (ctx->do_hw_dr1 && pic->opaque) {
mpi = pic->opaque; // reordered frame
assert(mpi);
mpi = mp_image_new_ref(mpi);
}
if (!mpi) {
struct mp_image new = {0};
mp_image_set_size(&new, avctx->width, avctx->height);
mp_image_setfmt(&new, ctx->best_csp);
for (int i = 0; i < 4; i++) {
new.planes[i] = pic->data[i];
new.stride[i] = pic->linesize[i];
}
if (ctx->do_dr1 && pic->opaque) {
struct FrameBuffer *fb = pic->opaque;
mp_buffer_ref(fb); // initial reference for mpi
mpi = mp_image_new_external_ref(&new, fb, fb_ref, fb_unref,
fb_is_unique);
} else {
mpi = mp_image_pool_get(ctx->non_dr1_pool, new.imgfmt,
new.w, new.h);
mp_image_copy(mpi, &new);
}
}
assert(mpi->planes[0]);
assert(mpi->imgfmt == pixfmt2imgfmt(avctx->pix_fmt));
mpi->colorspace = sh->colorspace;
mpi->levels = sh->color_range;
mpi->qscale = pic->qscale_table;
mpi->qstride = pic->qstride;
mpi->pict_type = pic->pict_type;
mpi->qscale_type = pic->qscale_type;
mpi->fields = MP_IMGFIELD_ORDERED;
if (pic->interlaced_frame)
mpi->fields |= MP_IMGFIELD_INTERLACED;
if (pic->top_field_first)
mpi->fields |= MP_IMGFIELD_TOP_FIRST;
if (pic->repeat_pict == 1)
mpi->fields |= MP_IMGFIELD_REPEAT_FIRST;
*out_image = mpi;
return 1;
}
static struct mp_image *decode_with_fallback(struct sh_video *sh,
struct demux_packet *packet, void *data,
int len, int flags, double *reordered_pts)
{
vd_ffmpeg_ctx *ctx = sh->context;
if (!ctx->avctx)
return NULL;
struct mp_image *mpi = NULL;
int res = decode(sh, packet, data, len, flags, reordered_pts, &mpi);
if (res >= 0)
return mpi;
// Failed hardware decoding? Try again in software.
if (ctx->software_fallback) {
uninit_avctx(sh);
sh->vf_initialized = 0;
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Error using hardware "
"decoding, falling back to software decoding.\n");
AVCodec *codec = ctx->software_fallback;
ctx->software_fallback = NULL;
if (init_avctx(sh, codec, NULL)) {
mpi = NULL;
decode(sh, packet, data, len, flags, reordered_pts, &mpi);
return mpi;
}
}
return NULL;
}
static int control(sh_video_t *sh, int cmd, void *arg)
{
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
switch (cmd) {
case VDCTRL_RESYNC_STREAM:
avcodec_flush_buffers(avctx);
return CONTROL_TRUE;
case VDCTRL_QUERY_UNSEEN_FRAMES:;
int delay = avctx->has_b_frames;
if (avctx->active_thread_type & FF_THREAD_FRAME)
delay += avctx->thread_count - 1;
return delay + 10;
case VDCTRL_RESET_ASPECT:
if (ctx->vo_initialized)
ctx->vo_initialized = false;
init_vo(sh);
return true;
}
return CONTROL_UNKNOWN;
}
const struct vd_functions mpcodecs_vd_ffmpeg = {
.info = &info,
.init = init,
.uninit = uninit,
.control = control,
.decode = decode_with_fallback,
};
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