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a8e69707f7
mpv/video/decode/vd_lavc.c
wm4 a8e69707f7 vd_lavc: add DR1 support 
Replace libavcodec's native buffer allocation with code taken from
ffplay/ffmpeg's libavfilter support. The code in lavc_dr1.c is directly
copied from cmdutils.c. Note that this is quite arcane code, which
contains some workarounds for decoder bugs and the like. This is not
really a maintainance burden, since fixes from ffmpeg can be directly
applied to the code in lavc_dr1.c.

It's unknown why libavcodec doesn't provide such a function directly.
avcodec_default_get_buffer() can't be reused for various reasons.
There's some hope that the work known as The Evil Plan [1] will make
custom get_buffer implementations unneeded.

The DR1 support as of this commit does nothing. A future commit will
use it to implement ref-counting for mp_image (similar to how AVFrame
will be ref-counted with The Evil Plan.)

[1] http://lists.libav.org/pipermail/libav-devel/2012-December/039781.html
2013-01-13 17:39:32 +01:00

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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/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 > 1024
#error palette too large, adapt libmpcodecs/vf.c:vf_get_image
#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->rawvideo_fmt = PIX_FMT_NONE;
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;
}
} else if (!IMGFMT_IS_HWACCEL(sh->format)) {
ctx->rawvideo_fmt = imgfmt2pixfmt(sh->format);
if (ctx->rawvideo_fmt != PIX_FMT_NONE)
lavc_codec = avcodec_find_decoder_by_name("rawvideo");
}
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 = 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) {
ctx->do_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 {
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;
if (ctx->rawvideo_fmt == PIX_FMT_NONE) {
avctx->codec_tag = sh->format;
} else {
avctx->pix_fmt = ctx->rawvideo_fmt;
}
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;
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)
{
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 struct mp_image *get_image_hwdec(vd_ffmpeg_ctx *ctx)
{
for (int n = 0; n < MAX_NUM_MPI; n++) {
struct mp_image *cur = &ctx->hwdec_mpi[n];
if (cur->usage_count == 0) {
*cur = (struct mp_image) {
.number = n,
.imgfmt = ctx->best_csp,
.usage_count = 1,
};
return cur;
}
}
return NULL;
}
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 = get_image_hwdec(ctx);
if (!mpi)
return -1;
struct vf_instance *vf = sh->vfilter;
vf->control(vf, VFCTRL_HWDEC_GET_SURFACE, mpi);
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);
assert(mpi->usage_count > 0);
mpi->usage_count--;
for (int i = 0; i < 4; i++)
pic->data[i] = NULL;
}
static av_unused void swap_palette(void *pal)
{
int i;
uint32_t *p = pal;
for (i = 0; i < AVPALETTE_COUNT; i++)
p[i] = le2me_32(p[i]);
}
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_dr1 && pic->opaque)
mpi = (mp_image_t *)pic->opaque;
if (!mpi) {
mpi = &ctx->export_mpi;
*mpi = (struct mp_image) {0};
mpi->type = MP_IMGTYPE_EXPORT;
mpi->flags = MP_IMGFLAG_PRESERVE;
mpi->w = mpi->width = avctx->width;
mpi->h = mpi->height = avctx->height;
mp_image_setfmt(mpi, ctx->best_csp);
for (int i = 0; i < 4; i++) {
mpi->planes[i] = pic->data[i];
mpi->stride[i] = pic->linesize[i];
}
}
if (!mpi->planes[0])
return 0; // ?
assert(mpi->imgfmt == pixfmt2imgfmt(avctx->pix_fmt));
#if BYTE_ORDER == BIG_ENDIAN
// FIXME: this might cause problems for buffers with FF_BUFFER_HINTS_PRESERVE
if (mpi->bpp == 8)
swap_palette(mpi->planes[1]);
#endif
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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