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392856ed4d
mpv/video/decode/vd_lavc.c
wm4 392856ed4d vd_lavc: by default, output all frames, even corrupted ones 
Set the flag CODEC_FLAG_OUTPUT_CORRUPT by default. Note that there is
also CODEC_FLAG2_SHOW_ALL, which is older, but this seems to be ffmpeg
only.

Note that whether you want this enabled depends on the user. Some might
prefer that only good frames are output, while others want the decoder
to try as hard as possible to output _anything_. Since mplayer/mpv is
rather the kind of player that tries hard instead of being "clever", set
the new default to override libavcodec's default.

A nice way to test this is switching video tracks. Since mpv doesn't
wait for the next key frame, it'll start feeding the decoder with a
packet from the middle of the stream.
2013-12-29 14:19:22 +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 "common/msg.h"
#include "options/options.h"
#include "bstr/bstr.h"
#include "common/av_opts.h"
#include "common/av_common.h"
#include "common/codecs.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 "video/decode/dec_video.h"
#include "demux/stheader.h"
#include "demux/packet.h"
#include "video/csputils.h"
#include "lavc.h"
#if AVPALETTE_SIZE != MP_PALETTE_SIZE
#error palette too large, adapt video/mp_image.h:MP_PALETTE_SIZE
#endif
#include "options/m_option.h"
static void init_avctx(struct dec_video *vd, const char *decoder,
struct vd_lavc_hwdec *hwdec);
static void uninit_avctx(struct dec_video *vd);
static void setup_refcounting_hw(struct AVCodecContext *s);
static enum AVPixelFormat get_format_hwdec(struct AVCodecContext *avctx,
const enum AVPixelFormat *pix_fmt);
static void uninit(struct dec_video *vd);
#define OPT_BASE_STRUCT struct MPOpts
const m_option_t lavc_decode_opts_conf[] = {
OPT_FLAG_CONSTANTS("fast", lavc_param.fast, 0, 0, CODEC_FLAG2_FAST),
OPT_FLAG("show-all", lavc_param.show_all, 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_FLAG("check-hw-profile", lavc_param.check_hw_profile, 0),
OPT_STRING("o", lavc_param.avopt, 0),
{NULL, NULL, 0, 0, 0, 0, NULL}
};
const struct vd_lavc_hwdec mp_vd_lavc_vdpau;
const struct vd_lavc_hwdec mp_vd_lavc_vdpau_old;
const struct vd_lavc_hwdec mp_vd_lavc_vda;
const struct vd_lavc_hwdec mp_vd_lavc_vaapi;
const struct vd_lavc_hwdec mp_vd_lavc_vaapi_copy;
static const struct vd_lavc_hwdec *hwdec_list[] = {
#if HAVE_VDPAU_HWACCEL
&mp_vd_lavc_vdpau,
#endif
#if HAVE_VDPAU_DECODER
&mp_vd_lavc_vdpau_old,
#endif
#if HAVE_VDA_HWACCEL
&mp_vd_lavc_vda,
#endif
#if HAVE_VAAPI_HWACCEL
&mp_vd_lavc_vaapi,
&mp_vd_lavc_vaapi_copy,
#endif
NULL
};
static struct vd_lavc_hwdec *find_hwcodec(enum hwdec_type api)
{
for (int n = 0; hwdec_list[n]; n++) {
if (hwdec_list[n]->type == api)
return (struct vd_lavc_hwdec *)hwdec_list[n];
}
return NULL;
}
static bool hwdec_codec_allowed(struct dec_video *vd, const char *codec)
{
bstr s = bstr0(vd->opts->hwdec_codecs);
while (s.len) {
bstr item;
bstr_split_tok(s, ",", &item, &s);
if (bstr_equals0(item, "all") || bstr_equals0(item, codec))
return true;
}
return false;
}
static enum AVDiscard str2AVDiscard(struct dec_video *vd, 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_ERR(vd, "Unknown discard value %s\n", str);
return AVDISCARD_DEFAULT;
}
// Find the correct profile entry for the current codec and profile.
// Assumes the table has higher profiles first (for each codec).
const struct hwdec_profile_entry *hwdec_find_profile(
struct lavc_ctx *ctx, const struct hwdec_profile_entry *table)
{
assert(AV_CODEC_ID_NONE == 0);
struct lavc_param *lavc_param = &ctx->opts->lavc_param;
enum AVCodecID codec = ctx->avctx->codec_id;
int profile = ctx->avctx->profile;
// Assume nobody cares about these aspects of the profile
if (codec == AV_CODEC_ID_H264) {
if (profile == FF_PROFILE_H264_CONSTRAINED_BASELINE)
profile = FF_PROFILE_H264_MAIN;
}
for (int n = 0; table[n].av_codec; n++) {
if (table[n].av_codec == codec) {
if (table[n].ff_profile == FF_PROFILE_UNKNOWN ||
profile == FF_PROFILE_UNKNOWN ||
table[n].ff_profile == profile ||
!lavc_param->check_hw_profile)
return &table[n];
}
}
return NULL;
}
// Check codec support, without checking the profile.
bool hwdec_check_codec_support(const char *decoder,
const struct hwdec_profile_entry *table)
{
enum AVCodecID codec = mp_codec_to_av_codec_id(decoder);
for (int n = 0; table[n].av_codec; n++) {
if (table[n].av_codec == codec)
return true;
}
return false;
}
int hwdec_get_max_refs(struct lavc_ctx *ctx)
{
return ctx->avctx->codec_id == AV_CODEC_ID_H264 ? 16 : 2;
}
void hwdec_request_api(struct mp_hwdec_info *info, const char *api_name)
{
if (info && info->load_api)
info->load_api(info, api_name);
}
static int hwdec_probe(struct vd_lavc_hwdec *hwdec, struct mp_hwdec_info *info,
const char *decoder, const char **hw_decoder)
{
if (hwdec->codec_pairs) {
for (int n = 0; hwdec->codec_pairs[n + 0]; n += 2) {
const char *sw = hwdec->codec_pairs[n + 0];
const char *hw = hwdec->codec_pairs[n + 1];
if (decoder && strcmp(decoder, sw) == 0) {
AVCodec *codec = avcodec_find_decoder_by_name(hw);
*hw_decoder = hw;
if (codec)
goto found;
}
}
return HWDEC_ERR_NO_CODEC;
found: ;
}
int r = 0;
if (hwdec->probe)
r = hwdec->probe(hwdec, info, decoder);
return r;
}
static bool probe_hwdec(struct dec_video *vd, bool autoprobe, enum hwdec_type api,
const char *decoder, struct vd_lavc_hwdec **use_hwdec,
const char **use_decoder)
{
struct vd_lavc_hwdec *hwdec = find_hwcodec(api);
if (!hwdec) {
MP_VERBOSE(vd, "Requested hardware decoder not "
"compiled.\n");
return false;
}
const char *hw_decoder = NULL;
int r = hwdec_probe(hwdec, &vd->hwdec_info, decoder, &hw_decoder);
if (r >= 0) {
*use_hwdec = hwdec;
*use_decoder = hw_decoder;
return true;
} else if (r == HWDEC_ERR_NO_CODEC) {
MP_VERBOSE(vd, "Hardware decoder '%s' not found in "
"libavcodec.\n", hw_decoder ? hw_decoder : decoder);
} else if (r == HWDEC_ERR_NO_CTX && !autoprobe) {
MP_WARN(vd, "VO does not support requested "
"hardware decoder.\n");
}
return false;
}
static int init(struct dec_video *vd, const char *decoder)
{
vd_ffmpeg_ctx *ctx;
ctx = vd->priv = talloc_zero(NULL, vd_ffmpeg_ctx);
ctx->log = vd->log;
ctx->opts = vd->opts;
ctx->non_dr1_pool = talloc_steal(ctx, mp_image_pool_new(16));
if (bstr_endswith0(bstr0(decoder), "_vdpau")) {
MP_WARN(vd, "VDPAU decoder '%s' was requested. "
"This way of enabling hardware\ndecoding is not supported "
"anymore. Use --hwdec=vdpau instead.\nThe --hwdec-codec=... "
"option can be used to restrict which codecs are\nenabled, "
"otherwise all hardware decoding is tried for all codecs.\n",
decoder);
uninit(vd);
return 0;
}
struct vd_lavc_hwdec *hwdec = NULL;
const char *hw_decoder = NULL;
if (hwdec_codec_allowed(vd, decoder)) {
if (vd->opts->hwdec_api == HWDEC_AUTO) {
for (int n = 0; hwdec_list[n]; n++) {
if (probe_hwdec(vd, true, hwdec_list[n]->type, decoder,
&hwdec, &hw_decoder))
break;
}
} else if (vd->opts->hwdec_api != HWDEC_NONE) {
probe_hwdec(vd, false, vd->opts->hwdec_api, decoder,
&hwdec, &hw_decoder);
}
} else {
MP_VERBOSE(vd, "Not trying to use hardware decoding: "
"codec %s is blacklisted by user.\n", decoder);
}
if (hwdec) {
ctx->software_fallback_decoder = talloc_strdup(ctx, decoder);
if (hw_decoder)
decoder = hw_decoder;
MP_INFO(vd, "Trying to use hardware decoding.\n");
} else if (vd->opts->hwdec_api != HWDEC_NONE) {
MP_INFO(vd, "Using software decoding.\n");
}
init_avctx(vd, decoder, hwdec);
if (!ctx->avctx) {
if (ctx->software_fallback_decoder) {
MP_ERR(vd, "Error initializing hardware decoding, "
"falling back to software decoding.\n");
decoder = ctx->software_fallback_decoder;
ctx->software_fallback_decoder = NULL;
init_avctx(vd, decoder, NULL);
}
if (!ctx->avctx) {
uninit(vd);
return 0;
}
}
return 1;
}
static void set_from_bih(AVCodecContext *avctx, uint32_t format,
MP_BITMAPINFOHEADER *bih)
{
switch (format) {
case MP_FOURCC('S','V','Q','3'):
case MP_FOURCC('A','V','R','n'):
case MP_FOURCC('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 (bih->biSize <= sizeof(*bih))
break;
av_opt_set_int(avctx, "extern_huff", 1, AV_OPT_SEARCH_CHILDREN);
avctx->extradata_size = bih->biSize - sizeof(*bih);
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(avctx->extradata, bih + 1, avctx->extradata_size);
break;
case MP_FOURCC('R','V','1','0'):
case MP_FOURCC('R','V','1','3'):
case MP_FOURCC('R','V','2','0'):
case MP_FOURCC('R','V','3','0'):
case MP_FOURCC('R','V','4','0'):
if (bih->biSize < sizeof(*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] =
format == MP_FOURCC('R','V','1','3') ?
0x10003001 : 0x10000000;
} else {
// has extra slice header (demux_rm or rm->avi streamcopy)
avctx->extradata_size = bih->biSize - sizeof(*bih);
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(avctx->extradata, bih + 1, avctx->extradata_size);
}
break;
default:
if (bih->biSize <= sizeof(*bih))
break;
avctx->extradata_size = bih->biSize - sizeof(*bih);
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(avctx->extradata, bih + 1, avctx->extradata_size);
break;
}
avctx->bits_per_coded_sample = bih->biBitCount;
avctx->coded_width = bih->biWidth;
avctx->coded_height = bih->biHeight;
}
static void init_avctx(struct dec_video *vd, const char *decoder,
struct vd_lavc_hwdec *hwdec)
{
vd_ffmpeg_ctx *ctx = vd->priv;
struct lavc_param *lavc_param = &vd->opts->lavc_param;
bool mp_rawvideo = false;
struct sh_stream *sh = vd->header;
assert(!ctx->avctx);
if (strcmp(decoder, "mp-rawvideo") == 0) {
mp_rawvideo = true;
decoder = "rawvideo";
}
AVCodec *lavc_codec = avcodec_find_decoder_by_name(decoder);
if (!lavc_codec)
return;
ctx->hwdec_info = &vd->hwdec_info;
ctx->do_dr1 = ctx->do_hw_dr1 = 0;
ctx->pix_fmt = AV_PIX_FMT_NONE;
ctx->hwdec = hwdec;
ctx->avctx = avcodec_alloc_context3(lavc_codec);
AVCodecContext *avctx = ctx->avctx;
avctx->opaque = vd;
avctx->codec_type = AVMEDIA_TYPE_VIDEO;
avctx->codec_id = lavc_codec->id;
#if HAVE_AVUTIL_REFCOUNTING
avctx->refcounted_frames = 1;
ctx->pic = av_frame_alloc();
#else
ctx->pic = avcodec_alloc_frame();
#endif
if (ctx->hwdec) {
ctx->do_hw_dr1 = true;
avctx->thread_count = 1;
avctx->get_format = get_format_hwdec;
setup_refcounting_hw(avctx);
if (ctx->hwdec->init(ctx) < 0) {
uninit_avctx(vd);
return;
}
} else {
#if !HAVE_AVUTIL_REFCOUNTING
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;
}
#endif
mp_set_avcodec_threads(avctx, lavc_param->threads);
}
avctx->flags |= lavc_param->bitexact;
avctx->flags2 |= lavc_param->fast;
if (lavc_param->show_all) {
#ifdef CODEC_FLAG2_SHOW_ALL
avctx->flags2 |= CODEC_FLAG2_SHOW_ALL; // ffmpeg only?
#endif
#ifdef CODEC_FLAG_OUTPUT_CORRUPT
avctx->flags |= CODEC_FLAG_OUTPUT_CORRUPT; // added with Libav 10
#endif
}
avctx->skip_loop_filter = str2AVDiscard(vd, lavc_param->skip_loop_filter_str);
avctx->skip_idct = str2AVDiscard(vd, lavc_param->skip_idct_str);
avctx->skip_frame = str2AVDiscard(vd, lavc_param->skip_frame_str);
if (lavc_param->avopt) {
if (parse_avopts(avctx, lavc_param->avopt) < 0) {
MP_ERR(vd, "Your options /%s/ look like gibberish to me pal\n",
lavc_param->avopt);
uninit_avctx(vd);
return;
}
}
// Do this after the above avopt handling in case it changes values
ctx->skip_frame = avctx->skip_frame;
avctx->codec_tag = sh->format;
avctx->coded_width = sh->video->disp_w;
avctx->coded_height = sh->video->disp_h;
// demux_mkv
if (sh->video->bih)
set_from_bih(avctx, sh->format, sh->video->bih);
if (mp_rawvideo) {
avctx->pix_fmt = imgfmt2pixfmt(sh->format);
avctx->codec_tag = 0;
if (avctx->pix_fmt == AV_PIX_FMT_NONE && sh->format)
MP_ERR(vd, "Image format %s not supported by lavc.\n",
mp_imgfmt_to_name(sh->format));
}
if (sh->lav_headers)
mp_copy_lav_codec_headers(avctx, sh->lav_headers);
/* open it */
if (avcodec_open2(avctx, lavc_codec, NULL) < 0) {
MP_ERR(vd, "Could not open codec.\n");
uninit_avctx(vd);
return;
}
}
static void uninit_avctx(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVCodecContext *avctx = ctx->avctx;
if (avctx) {
if (avctx->codec && avcodec_close(avctx) < 0)
MP_ERR(vd, "Could not close codec.\n");
av_freep(&avctx->extradata);
av_freep(&avctx->slice_offset);
}
av_freep(&ctx->avctx);
if (ctx->hwdec && ctx->hwdec->uninit)
ctx->hwdec->uninit(ctx);
#if HAVE_AVUTIL_REFCOUNTING
av_frame_free(&ctx->pic);
#else
avcodec_free_frame(&ctx->pic);
mp_buffer_pool_free(&ctx->dr1_buffer_pool);
#endif
}
static void uninit(struct dec_video *vd)
{
uninit_avctx(vd);
}
static void update_image_params(struct dec_video *vd, AVFrame *frame,
struct mp_image_params *out_params)
{
vd_ffmpeg_ctx *ctx = vd->priv;
int width = frame->width;
int height = frame->height;
float aspect = av_q2d(frame->sample_aspect_ratio) * width / height;
int pix_fmt = frame->format;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(54, 40, 0)
pix_fmt = ctx->avctx->pix_fmt;
#endif
if (pix_fmt != ctx->pix_fmt) {
ctx->pix_fmt = pix_fmt;
ctx->best_csp = pixfmt2imgfmt(pix_fmt);
if (!ctx->best_csp)
MP_ERR(vd, "lavc pixel format %s not supported.\n",
av_get_pix_fmt_name(pix_fmt));
}
int d_w, d_h;
vf_set_dar(&d_w, &d_h, width, height, aspect);
*out_params = (struct mp_image_params) {
.imgfmt = ctx->best_csp,
.w = width,
.h = height,
.d_w = d_w,
.d_h = d_h,
.colorspace = avcol_spc_to_mp_csp(ctx->avctx->colorspace),
.colorlevels = avcol_range_to_mp_csp_levels(ctx->avctx->color_range),
.chroma_location =
avchroma_location_to_mp(ctx->avctx->chroma_sample_location),
};
}
static enum AVPixelFormat get_format_hwdec(struct AVCodecContext *avctx,
const enum AVPixelFormat *fmt)
{
struct dec_video *vd = avctx->opaque;
vd_ffmpeg_ctx *ctx = vd->priv;
MP_VERBOSE(vd, "Pixel formats supported by decoder:");
for (int i = 0; fmt[i] != AV_PIX_FMT_NONE; i++)
MP_VERBOSE(vd, " %s", av_get_pix_fmt_name(fmt[i]));
MP_VERBOSE(vd, "\n");
assert(ctx->hwdec);
for (int i = 0; fmt[i] != AV_PIX_FMT_NONE; i++) {
const int *okfmt = ctx->hwdec->image_formats;
for (int n = 0; okfmt && okfmt[n]; n++) {
if (imgfmt2pixfmt(okfmt[n]) == fmt[i])
return fmt[i];
}
}
return AV_PIX_FMT_NONE;
}
static struct mp_image *get_surface_hwdec(struct dec_video *vd, AVFrame *pic)
{
vd_ffmpeg_ctx *ctx = vd->priv;
/* 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(pic->format);
if (!IMGFMT_IS_HWACCEL(imgfmt))
return NULL;
// Using frame->width/height is bad. For non-mod 16 video (which would
// require alignment of frame sizes) we want the decoded size, not the
// aligned size. At least vdpau needs this: the video mixer is created
// with decoded size, and the video surfaces must have matching size.
int w = ctx->avctx->width;
int h = ctx->avctx->height;
struct mp_image *mpi = ctx->hwdec->allocate_image(ctx, imgfmt, w, h);
if (mpi) {
for (int i = 0; i < 4; i++)
pic->data[i] = mpi->planes[i];
}
return mpi;
}
#if HAVE_AVUTIL_REFCOUNTING
static void free_mpi(void *opaque, uint8_t *data)
{
struct mp_image *mpi = opaque;
talloc_free(mpi);
}
static int get_buffer2_hwdec(AVCodecContext *avctx, AVFrame *pic, int flags)
{
struct dec_video *vd = avctx->opaque;
struct mp_image *mpi = get_surface_hwdec(vd, pic);
if (!mpi)
return -1;
pic->buf[0] = av_buffer_create(NULL, 0, free_mpi, mpi, 0);
return 0;
}
static void setup_refcounting_hw(AVCodecContext *avctx)
{
avctx->get_buffer2 = get_buffer2_hwdec;
}
#else /* HAVE_AVUTIL_REFCOUNTING */
static int get_buffer_hwdec(AVCodecContext *avctx, AVFrame *pic)
{
struct dec_video *vd = avctx->opaque;
struct mp_image *mpi = get_surface_hwdec(vd, pic);
if (!mpi)
return -1;
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 setup_refcounting_hw(AVCodecContext *avctx)
{
avctx->get_buffer = get_buffer_hwdec;
avctx->release_buffer = release_buffer_hwdec;
}
#endif /* HAVE_AVUTIL_REFCOUNTING */
#if HAVE_AVUTIL_REFCOUNTING
static struct mp_image *image_from_decoder(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVFrame *pic = ctx->pic;
struct mp_image *img = mp_image_from_av_frame(pic);
av_frame_unref(pic);
return img;
}
#else /* HAVE_AVUTIL_REFCOUNTING */
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 struct mp_image *image_from_decoder(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVFrame *pic = ctx->pic;
struct mp_image new = {0};
mp_image_copy_fields_from_av_frame(&new, pic);
struct mp_image *mpi;
if (ctx->do_hw_dr1 && pic->opaque) {
mpi = pic->opaque; // reordered frame
assert(mpi);
mpi = mp_image_new_ref(mpi);
mp_image_copy_attributes(mpi, &new);
} else 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, NULL);
} else {
mpi = mp_image_pool_new_copy(ctx->non_dr1_pool, &new);
}
return mpi;
}
#endif /* HAVE_AVUTIL_REFCOUNTING */
static int decode(struct dec_video *vd, struct demux_packet *packet,
int flags, struct mp_image **out_image)
{
int got_picture = 0;
int ret;
vd_ffmpeg_ctx *ctx = vd->priv;
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;
mp_set_av_packet(&pkt, packet, NULL);
ret = avcodec_decode_video2(avctx, ctx->pic, &got_picture, &pkt);
if (ret < 0) {
MP_WARN(vd, "Error while decoding frame!\n");
return -1;
}
// Skipped frame, or delayed output due to multithreaded decoding.
if (!got_picture)
return 0;
struct mp_image_params params;
update_image_params(vd, ctx->pic, &params);
vd->codec_pts = mp_pts_from_av(ctx->pic->pkt_pts, NULL);
vd->codec_dts = mp_pts_from_av(ctx->pic->pkt_dts, NULL);
// Note: potentially resets ctx->pic as it is transferred to mpi
struct mp_image *mpi = image_from_decoder(vd);
assert(mpi->planes[0]);
mp_image_set_params(mpi, &params);
if (ctx->hwdec && ctx->hwdec->process_image)
mpi = ctx->hwdec->process_image(ctx, mpi);
*out_image = mpi;
return 1;
}
static int force_fallback(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
if (ctx->software_fallback_decoder) {
uninit_avctx(vd);
MP_ERR(vd, "Error using hardware "
"decoding, falling back to software decoding.\n");
const char *decoder = ctx->software_fallback_decoder;
ctx->software_fallback_decoder = NULL;
init_avctx(vd, decoder, NULL);
return ctx->avctx ? CONTROL_OK : CONTROL_ERROR;
}
return CONTROL_FALSE;
}
static struct mp_image *decode_with_fallback(struct dec_video *vd,
struct demux_packet *packet, int flags)
{
vd_ffmpeg_ctx *ctx = vd->priv;
if (!ctx->avctx)
return NULL;
struct mp_image *mpi = NULL;
int res = decode(vd, packet, flags, &mpi);
if (res < 0) {
// Failed hardware decoding? Try again in software.
if (force_fallback(vd) == CONTROL_OK)
decode(vd, packet, flags, &mpi);
}
return mpi;
}
static int control(struct dec_video *vd, int cmd, void *arg)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVCodecContext *avctx = ctx->avctx;
switch (cmd) {
case VDCTRL_RESET:
avcodec_flush_buffers(avctx);
return CONTROL_TRUE;
case VDCTRL_QUERY_UNSEEN_FRAMES:;
int delay = avctx->has_b_frames;
assert(delay >= 0);
if (avctx->active_thread_type & FF_THREAD_FRAME)
delay += avctx->thread_count - 1;
*(int *)arg = delay;
return CONTROL_TRUE;
case VDCTRL_FORCE_HWDEC_FALLBACK:
return force_fallback(vd);
}
return CONTROL_UNKNOWN;
}
static void add_decoders(struct mp_decoder_list *list)
{
mp_add_lavc_decoders(list, AVMEDIA_TYPE_VIDEO);
mp_add_decoder(list, "lavc", "mp-rawvideo", "mp-rawvideo",
"raw video");
}
const struct vd_functions mpcodecs_vd_ffmpeg = {
.name = "lavc",
.add_decoders = add_decoders,
.init = init,
.uninit = uninit,
.control = control,
.decode = decode_with_fallback,
};
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