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05e4df3f0c
mpv/video/decode/vd_lavc.c
wm4 05e4df3f0c video/audio: always provide "proper" timestamps to libavcodec 
Instead of passing through double float timestamps opaquely, pass real
timestamps. Do so by always setting a valid timebase on the
AVCodecContext for audio and video decoding.

Specifically try not to round timestamps to a too coarse timebase, which
could round off small adjustments to timestamps (such as for start time
rebasing or demux_timeline). If the timebase is considered too coarse,
make it finer.

This gets rid of the need to do this specifically for some hardware
decoding wrapper. The old method of passing through double timestamps
was also a bit questionable. While libavcodec is not supposed to
interpret timestamps at all if no timebase is provided, it was
needlessly tricky. Also, it actually does compare them with
AV_NOPTS_VALUE. This change will probably also reduce confusion in the
future.
2016-08-19 14:59:30 +02:00

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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#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 "mpv_talloc.h"
#include "config.h"
#include "common/msg.h"
#include "options/options.h"
#include "misc/bstr.h"
#include "common/av_common.h"
#include "common/codecs.h"
#include "video/fmt-conversion.h"
#include "vd.h"
#include "video/img_format.h"
#include "video/filter/vf.h"
#include "video/decode/dec_video.h"
#include "demux/demux.h"
#include "demux/stheader.h"
#include "demux/packet.h"
#include "video/csputils.h"
#include "video/sws_utils.h"
#if HAVE_AVUTIL_MASTERING_METADATA
#include <libavutil/mastering_display_metadata.h>
#endif
#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 int get_buffer2_hwdec(AVCodecContext *avctx, AVFrame *pic, int flags);
static enum AVPixelFormat get_format_hwdec(struct AVCodecContext *avctx,
const enum AVPixelFormat *pix_fmt);
#define OPT_BASE_STRUCT struct vd_lavc_params
struct vd_lavc_params {
int fast;
int show_all;
int skip_loop_filter;
int skip_idct;
int skip_frame;
int framedrop;
int threads;
int bitexact;
int check_hw_profile;
int software_fallback;
char **avopts;
};
static const struct m_opt_choice_alternatives discard_names[] = {
{"none", AVDISCARD_NONE},
{"default", AVDISCARD_DEFAULT},
{"nonref", AVDISCARD_NONREF},
{"bidir", AVDISCARD_BIDIR},
{"nonkey", AVDISCARD_NONKEY},
{"all", AVDISCARD_ALL},
{0}
};
#define OPT_DISCARD(name, field, flags) \
OPT_GENERAL(int, name, field, flags, .type = CONF_TYPE_CHOICE, \
.priv = (void *)discard_names)
const struct m_sub_options vd_lavc_conf = {
.opts = (const m_option_t[]){
OPT_FLAG("fast", fast, 0),
OPT_FLAG("show-all", show_all, 0),
OPT_DISCARD("skiploopfilter", skip_loop_filter, 0),
OPT_DISCARD("skipidct", skip_idct, 0),
OPT_DISCARD("skipframe", skip_frame, 0),
OPT_DISCARD("framedrop", framedrop, 0),
OPT_INT("threads", threads, M_OPT_MIN, .min = 0),
OPT_FLAG("bitexact", bitexact, 0),
OPT_FLAG("check-hw-profile", check_hw_profile, 0),
OPT_CHOICE_OR_INT("software-fallback", software_fallback, 0, 1, INT_MAX,
({"no", INT_MAX}, {"yes", 1})),
OPT_KEYVALUELIST("o", avopts, 0),
{0}
},
.size = sizeof(struct vd_lavc_params),
.defaults = &(const struct vd_lavc_params){
.show_all = 0,
.check_hw_profile = 1,
.software_fallback = 3,
.skip_loop_filter = AVDISCARD_DEFAULT,
.skip_idct = AVDISCARD_DEFAULT,
.skip_frame = AVDISCARD_DEFAULT,
.framedrop = AVDISCARD_NONREF,
},
};
extern const struct vd_lavc_hwdec mp_vd_lavc_vdpau;
extern const struct vd_lavc_hwdec mp_vd_lavc_videotoolbox;
extern const struct vd_lavc_hwdec mp_vd_lavc_videotoolbox_copy;
extern const struct vd_lavc_hwdec mp_vd_lavc_vaapi;
extern const struct vd_lavc_hwdec mp_vd_lavc_vaapi_copy;
extern const struct vd_lavc_hwdec mp_vd_lavc_dxva2;
extern const struct vd_lavc_hwdec mp_vd_lavc_dxva2_copy;
extern const struct vd_lavc_hwdec mp_vd_lavc_d3d11va;
extern const struct vd_lavc_hwdec mp_vd_lavc_d3d11va_copy;
#if HAVE_RPI
static const struct vd_lavc_hwdec mp_vd_lavc_rpi = {
.type = HWDEC_RPI,
.lavc_suffix = "_mmal",
.image_format = IMGFMT_MMAL,
};
#endif
#if HAVE_ANDROID
static const struct vd_lavc_hwdec mp_vd_lavc_mediacodec = {
.type = HWDEC_MEDIACODEC,
.lavc_suffix = "_mediacodec",
.copying = true,
};
#endif
static const struct vd_lavc_hwdec *const hwdec_list[] = {
#if HAVE_RPI
&mp_vd_lavc_rpi,
#endif
#if HAVE_VDPAU_HWACCEL
&mp_vd_lavc_vdpau,
#endif
#if HAVE_VIDEOTOOLBOX_HWACCEL
&mp_vd_lavc_videotoolbox,
&mp_vd_lavc_videotoolbox_copy,
#endif
#if HAVE_VAAPI_HWACCEL
&mp_vd_lavc_vaapi,
&mp_vd_lavc_vaapi_copy,
#endif
#if HAVE_D3D_HWACCEL
&mp_vd_lavc_d3d11va,
&mp_vd_lavc_dxva2,
&mp_vd_lavc_dxva2_copy,
&mp_vd_lavc_d3d11va_copy,
#endif
#if HAVE_ANDROID
&mp_vd_lavc_mediacodec,
#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 void hwdec_lock(struct lavc_ctx *ctx)
{
if (ctx->hwdec && ctx->hwdec->lock)
ctx->hwdec->lock(ctx);
}
static void hwdec_unlock(struct lavc_ctx *ctx)
{
if (ctx->hwdec && ctx->hwdec->unlock)
ctx->hwdec->unlock(ctx);
}
// 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 vd_lavc_params *lavc_param = ctx->opts->vd_lavc_params;
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 == 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 *codec,
const struct hwdec_profile_entry *table)
{
enum AVCodecID codecid = mp_codec_to_av_codec_id(codec);
for (int n = 0; table[n].av_codec; n++) {
if (table[n].av_codec == codecid)
return true;
}
return false;
}
int hwdec_get_max_refs(struct lavc_ctx *ctx)
{
if (ctx->avctx->codec_id == AV_CODEC_ID_H264 ||
ctx->avctx->codec_id == AV_CODEC_ID_HEVC)
return 16;
return 2;
}
// This is intended to return the name of a decoder for a given wrapper API.
// Decoder wrappers are usually added to libavcodec with a specific suffix.
// For example the mmal h264 decoder is named h264_mmal.
// This API would e.g. return h264_mmal for
// hwdec_find_decoder("h264", "_mmal").
// Just concatenating the two names will not always work due to inconsistencies
// (e.g. "mpeg2video" vs. "mpeg2").
const char *hwdec_find_decoder(const char *codec, const char *suffix)
{
enum AVCodecID codec_id = mp_codec_to_av_codec_id(codec);
if (codec_id == AV_CODEC_ID_NONE)
return NULL;
AVCodec *cur = NULL;
for (;;) {
cur = av_codec_next(cur);
if (!cur)
break;
if (cur->id == codec_id && av_codec_is_decoder(cur) &&
bstr_endswith0(bstr0(cur->name), suffix))
return cur->name;
}
return NULL;
}
// Parallel to hwdec_find_decoder(): return whether a hwdec can use the given
// decoder. This can't be answered accurately; it works for wrapper decoders
// only (like mmal), and for real hwaccels this will always return false.
static bool hwdec_is_wrapper(struct vd_lavc_hwdec *hwdec, const char *decoder)
{
if (!hwdec->lavc_suffix)
return false;
return bstr_endswith0(bstr0(decoder), hwdec->lavc_suffix);
}
static int hwdec_probe(struct dec_video *vd, struct vd_lavc_hwdec *hwdec,
const char *codec)
{
vd_ffmpeg_ctx *ctx = vd->priv;
int r = 0;
if (hwdec->probe)
r = hwdec->probe(ctx, hwdec, codec);
if (r >= 0) {
if (hwdec->lavc_suffix && !hwdec_find_decoder(codec, hwdec->lavc_suffix))
return HWDEC_ERR_NO_CODEC;
}
return r;
}
static struct vd_lavc_hwdec *probe_hwdec(struct dec_video *vd, bool autoprobe,
enum hwdec_type api,
const char *codec)
{
MP_VERBOSE(vd, "Probing '%s'...\n", m_opt_choice_str(mp_hwdec_names, api));
struct vd_lavc_hwdec *hwdec = find_hwcodec(api);
if (!hwdec) {
MP_VERBOSE(vd, "Requested hardware decoder not compiled.\n");
return NULL;
}
int r = hwdec_probe(vd, hwdec, codec);
if (r == HWDEC_ERR_EMULATED) {
if (autoprobe)
return NULL;
// User requested this explicitly.
MP_WARN(vd, "Using emulated hardware decoding API.\n");
r = 0;
}
if (r >= 0) {
return hwdec;
} else if (r == HWDEC_ERR_NO_CODEC) {
MP_VERBOSE(vd, "Hardware decoder for '%s' with the given API not found "
"in libavcodec.\n", codec);
} else if (r == HWDEC_ERR_NO_CTX && !autoprobe) {
MP_WARN(vd, "VO does not support requested hardware decoder, or "
"loading it failed.\n");
}
return NULL;
}
static void uninit(struct dec_video *vd)
{
uninit_avctx(vd);
talloc_free(vd->priv);
}
static void force_fallback(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
uninit_avctx(vd);
int lev = ctx->hwdec_notified ? MSGL_WARN : MSGL_V;
mp_msg(vd->log, lev, "Falling back to software decoding.\n");
init_avctx(vd, ctx->decoder, NULL);
}
static void reinit(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
const char *decoder = ctx->decoder;
const char *codec = vd->codec->codec;
uninit_avctx(vd);
struct vd_lavc_hwdec *hwdec = NULL;
if (hwdec_codec_allowed(vd, codec)) {
int api = vd->opts->hwdec_api;
if (HWDEC_IS_AUTO(api)) {
// If a specific decoder is forced, we should try a hwdec method
// that works with it, instead of simply failing later at runtime.
// This is good for avoiding trying "normal" hwaccels on wrapper
// decoders (like vaapi on a mmal decoder). Since libavcodec doesn't
// tell us which decoder supports which hwaccel methods without
// actually running it, do it by detecting such wrapper decoders.
// On the other hand, e.g. "--hwdec=rpi" should always force the
// wrapper decoder, so be careful not to break this case.
bool might_be_wrapper = false;
for (int n = 0; hwdec_list[n]; n++) {
struct vd_lavc_hwdec *other = (void *)hwdec_list[n];
if (hwdec_is_wrapper(other, decoder))
might_be_wrapper = true;
}
for (int n = 0; hwdec_list[n]; n++) {
hwdec = probe_hwdec(vd, true, hwdec_list[n]->type, codec);
if (hwdec) {
if (might_be_wrapper && !hwdec_is_wrapper(hwdec, decoder)) {
MP_VERBOSE(vd, "This hwaccel is not compatible.\n");
continue;
}
if (api == HWDEC_AUTO_COPY && !hwdec->copying) {
MP_VERBOSE(vd, "Not using this for auto-copy mode.\n");
continue;
}
break;
}
}
} else if (api != HWDEC_NONE) {
hwdec = probe_hwdec(vd, false, api, codec);
}
} else {
MP_VERBOSE(vd, "Not trying to use hardware decoding: codec %s is not "
"on whitelist, or does not support hardware acceleration.\n",
codec);
}
if (hwdec) {
if (hwdec->get_codec)
decoder = hwdec->get_codec(ctx, decoder);
if (hwdec->lavc_suffix)
decoder = hwdec_find_decoder(codec, hwdec->lavc_suffix);
MP_VERBOSE(vd, "Trying hardware decoding.\n");
} else {
MP_VERBOSE(vd, "Using software decoding.\n");
}
init_avctx(vd, decoder, hwdec);
if (!ctx->avctx && hwdec)
force_fallback(vd);
}
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->decoder = talloc_strdup(ctx, decoder);
ctx->hwdec_devs = vd->hwdec_devs;
reinit(vd);
if (!ctx->avctx) {
uninit(vd);
return 0;
}
return 1;
}
static void init_avctx(struct dec_video *vd, const char *decoder,
struct vd_lavc_hwdec *hwdec)
{
vd_ffmpeg_ctx *ctx = vd->priv;
struct vd_lavc_params *lavc_param = vd->opts->vd_lavc_params;
bool mp_rawvideo = false;
struct mp_codec_params *c = vd->codec;
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->codec_timebase = mp_get_codec_timebase(vd->codec);
ctx->pix_fmt = AV_PIX_FMT_NONE;
ctx->hwdec = hwdec;
ctx->hwdec_fmt = 0;
ctx->avctx = avcodec_alloc_context3(lavc_codec);
AVCodecContext *avctx = ctx->avctx;
if (!ctx->avctx)
goto error;
avctx->opaque = vd;
avctx->codec_type = AVMEDIA_TYPE_VIDEO;
avctx->codec_id = lavc_codec->id;
if (ctx->codec_timebase.num)
avctx->time_base = ctx->codec_timebase;
avctx->refcounted_frames = 1;
ctx->pic = av_frame_alloc();
if (!ctx->pic)
goto error;
if (ctx->hwdec) {
avctx->thread_count = 1;
if (ctx->hwdec->image_format)
avctx->get_format = get_format_hwdec;
if (ctx->hwdec->allocate_image)
avctx->get_buffer2 = get_buffer2_hwdec;
if (ctx->hwdec->init && ctx->hwdec->init(ctx) < 0)
goto error;
ctx->max_delay_queue = ctx->hwdec->delay_queue;
} else {
mp_set_avcodec_threads(vd->log, avctx, lavc_param->threads);
}
avctx->flags |= lavc_param->bitexact ? CODEC_FLAG_BITEXACT : 0;
avctx->flags2 |= lavc_param->fast ? CODEC_FLAG2_FAST : 0;
if (lavc_param->show_all)
avctx->flags |= CODEC_FLAG_OUTPUT_CORRUPT;
avctx->skip_loop_filter = lavc_param->skip_loop_filter;
avctx->skip_idct = lavc_param->skip_idct;
avctx->skip_frame = lavc_param->skip_frame;
mp_set_avopts(vd->log, avctx, lavc_param->avopts);
// Do this after the above avopt handling in case it changes values
ctx->skip_frame = avctx->skip_frame;
avctx->codec_tag = c->codec_tag;
avctx->coded_width = c->disp_w;
avctx->coded_height = c->disp_h;
avctx->bits_per_coded_sample = c->bits_per_coded_sample;
mp_lavc_set_extradata(avctx, c->extradata, c->extradata_size);
if (mp_rawvideo) {
avctx->pix_fmt = imgfmt2pixfmt(c->codec_tag);
avctx->codec_tag = 0;
if (avctx->pix_fmt == AV_PIX_FMT_NONE && c->codec_tag)
MP_ERR(vd, "Image format %s not supported by lavc.\n",
mp_imgfmt_to_name(c->codec_tag));
}
mp_set_lav_codec_headers(avctx, c);
/* open it */
if (avcodec_open2(avctx, lavc_codec, NULL) < 0)
goto error;
return;
error:
MP_ERR(vd, "Could not open codec.\n");
uninit_avctx(vd);
}
static void reset_avctx(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
if (ctx->avctx && avcodec_is_open(ctx->avctx))
avcodec_flush_buffers(ctx->avctx);
ctx->flushing = false;
}
static void flush_all(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
for (int n = 0; n < ctx->num_delay_queue; n++)
talloc_free(ctx->delay_queue[n]);
ctx->num_delay_queue = 0;
reset_avctx(vd);
}
static void uninit_avctx(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
flush_all(vd);
av_frame_free(&ctx->pic);
if (ctx->avctx) {
if (avcodec_close(ctx->avctx) < 0)
MP_ERR(vd, "Could not close codec.\n");
av_freep(&ctx->avctx->extradata);
}
if (ctx->hwdec && ctx->hwdec->uninit)
ctx->hwdec->uninit(ctx);
ctx->hwdec = NULL;
av_freep(&ctx->avctx);
ctx->hwdec_failed = false;
ctx->hwdec_fail_count = 0;
ctx->max_delay_queue = 0;
}
static void update_image_params(struct dec_video *vd, AVFrame *frame,
struct mp_image_params *out_params)
{
vd_ffmpeg_ctx *ctx = vd->priv;
struct MPOpts *opts = ctx->opts;
#if HAVE_AVUTIL_MASTERING_METADATA
// Get the reference peak (for HDR) if available. This is cached into ctx
// when it's found, since it's not available on every frame (and seems to
// be only available for keyframes)
AVFrameSideData *sd = av_frame_get_side_data(frame,
AV_FRAME_DATA_MASTERING_DISPLAY_METADATA);
if (sd) {
AVMasteringDisplayMetadata *mdm = (AVMasteringDisplayMetadata *)sd->data;
if (mdm->has_luminance) {
double peak = av_q2d(mdm->max_luminance);
if (!isnormal(peak) || peak < 10 || peak > 100000) {
// Invalid data, ignore it. Sadly necessary
MP_WARN(vd, "Invalid HDR reference peak in stream: %f\n", peak);
} else {
ctx->cached_hdr_peak = peak;
}
}
}
#endif
*out_params = (struct mp_image_params) {
.imgfmt = pixfmt2imgfmt(frame->format),
.w = frame->width,
.h = frame->height,
.p_w = frame->sample_aspect_ratio.num,
.p_h = frame->sample_aspect_ratio.den,
.color = {
.space = avcol_spc_to_mp_csp(ctx->avctx->colorspace),
.levels = avcol_range_to_mp_csp_levels(ctx->avctx->color_range),
.primaries = avcol_pri_to_mp_csp_prim(ctx->avctx->color_primaries),
.gamma = avcol_trc_to_mp_csp_trc(ctx->avctx->color_trc),
.sig_peak = ctx->cached_hdr_peak,
},
.chroma_location =
avchroma_location_to_mp(ctx->avctx->chroma_sample_location),
.rotate = vd->codec->rotate,
.stereo_in = vd->codec->stereo_mode,
};
if (opts->video_rotate < 0) {
out_params->rotate = 0;
} else {
out_params->rotate = (out_params->rotate + opts->video_rotate) % 360;
}
out_params->stereo_out = opts->video_stereo_mode;
}
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");
#if HAVE_AVCODEC_PROFILE_NAME
const char *profile = avcodec_profile_name(avctx->codec_id, avctx->profile);
MP_VERBOSE(vd, "Codec profile: %s (0x%x)\n", profile ? profile : "unknown",
avctx->profile);
#endif
assert(ctx->hwdec);
ctx->hwdec_request_reinit |= ctx->hwdec_failed;
ctx->hwdec_failed = false;
for (int i = 0; fmt[i] != AV_PIX_FMT_NONE; i++) {
if (ctx->hwdec->image_format == pixfmt2imgfmt(fmt[i])) {
// There could be more reasons for a change, and it's possible
// that we miss some. (Might also depend on the hwaccel type.)
bool change =
ctx->hwdec_w != avctx->coded_width ||
ctx->hwdec_h != avctx->coded_height ||
ctx->hwdec_fmt != ctx->hwdec->image_format ||
ctx->hwdec_profile != avctx->profile ||
ctx->hwdec_request_reinit;
ctx->hwdec_w = avctx->coded_width;
ctx->hwdec_h = avctx->coded_height;
ctx->hwdec_fmt = ctx->hwdec->image_format;
ctx->hwdec_profile = avctx->profile;
ctx->hwdec_request_reinit = false;
if (change && ctx->hwdec->init_decoder) {
if (ctx->hwdec->init_decoder(ctx, ctx->hwdec_w, ctx->hwdec_h) < 0)
{
ctx->hwdec_fmt = 0;
break;
}
}
return fmt[i];
}
}
ctx->hwdec_failed = true;
for (int i = 0; fmt[i] != AV_PIX_FMT_NONE; i++) {
const AVPixFmtDescriptor *d = av_pix_fmt_desc_get(fmt[i]);
if (d && !(d->flags & AV_PIX_FMT_FLAG_HWACCEL))
return fmt[i];
}
return AV_PIX_FMT_NONE;
}
static int get_buffer2_hwdec(AVCodecContext *avctx, AVFrame *pic, int flags)
{
struct dec_video *vd = avctx->opaque;
vd_ffmpeg_ctx *ctx = vd->priv;
int imgfmt = pixfmt2imgfmt(pic->format);
if (!ctx->hwdec || ctx->hwdec_fmt != imgfmt)
ctx->hwdec_failed = true;
/* Hardware decoding failed, and we will trigger a proper fallback later
* when returning from the decode call. (We are forcing complete
* reinitialization later to reset the thread count properly.)
*/
if (ctx->hwdec_failed)
return avcodec_default_get_buffer2(avctx, pic, flags);
// We expect it to use the exact size used to create the hw decoder in
// get_format_hwdec(). For cropped video, this is expected to be the
// uncropped size (usually coded_width/coded_height).
int w = pic->width;
int h = pic->height;
if (imgfmt != ctx->hwdec_fmt && w != ctx->hwdec_w && h != ctx->hwdec_h)
return -1;
struct mp_image *mpi = ctx->hwdec->allocate_image(ctx, w, h);
if (!mpi)
return -1;
for (int i = 0; i < 4; i++) {
pic->data[i] = mpi->planes[i];
pic->buf[i] = mpi->bufs[i];
mpi->bufs[i] = NULL;
}
talloc_free(mpi);
return 0;
}
static struct mp_image *read_output(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
if (!ctx->num_delay_queue)
return NULL;
struct mp_image *res = ctx->delay_queue[0];
MP_TARRAY_REMOVE_AT(ctx->delay_queue, ctx->num_delay_queue, 0);
if (ctx->hwdec && ctx->hwdec->process_image)
res = ctx->hwdec->process_image(ctx, res);
return res ? mp_img_swap_to_native(res) : NULL;
}
static void 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;
struct vd_lavc_params *opts = ctx->opts->vd_lavc_params;
bool consumed = false;
AVPacket pkt;
if (!avctx)
return;
if (flags) {
// hr-seek framedrop vs. normal framedrop
avctx->skip_frame = flags == 2 ? AVDISCARD_NONREF : opts->framedrop;
} else {
// normal playback
avctx->skip_frame = ctx->skip_frame;
}
mp_set_av_packet(&pkt, packet, &ctx->codec_timebase);
ctx->flushing |= !pkt.data;
// Reset decoder if hw state got reset, or new data comes during flushing.
if (ctx->hwdec_request_reinit || (pkt.data && ctx->flushing))
reset_avctx(vd);
hwdec_lock(ctx);
#if HAVE_AVCODEC_NEW_CODEC_API
ret = avcodec_send_packet(avctx, packet ? &pkt : NULL);
if (ret >= 0 || ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
if (ret >= 0)
consumed = true;
ret = avcodec_receive_frame(avctx, ctx->pic);
if (ret >= 0)
got_picture = 1;
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
ret = 0;
} else {
consumed = true;
}
#else
ret = avcodec_decode_video2(avctx, ctx->pic, &got_picture, &pkt);
consumed = true;
#endif
hwdec_unlock(ctx);
// Reset decoder if it was fully flushed. Caller might send more flush
// packets, or even new actual packets.
if (ctx->flushing && (ret < 0 || !got_picture))
reset_avctx(vd);
if (ret < 0) {
MP_WARN(vd, "Error while decoding frame!\n");
if (ctx->hwdec) {
ctx->hwdec_fail_count += 1;
// The FFmpeg VT hwaccel is buggy and can crash after 1 broken frame.
bool vt = ctx->hwdec && ctx->hwdec->type == HWDEC_VIDEOTOOLBOX;
if (ctx->hwdec_fail_count >= opts->software_fallback || vt)
ctx->hwdec_failed = true;
}
if (!ctx->hwdec_failed && packet)
packet->len = 0; // skip failed packet
return;
}
if (ctx->hwdec && ctx->hwdec_failed) {
av_frame_unref(ctx->pic);
return;
}
if (packet && consumed)
packet->len = 0;
// Skipped frame, or delayed output due to multithreaded decoding.
if (!got_picture) {
if (!packet)
*out_image = read_output(vd);
return;
}
ctx->hwdec_fail_count = 0;
AVFrameSideData *sd = NULL;
sd = av_frame_get_side_data(ctx->pic, AV_FRAME_DATA_A53_CC);
if (sd) {
struct demux_packet *cc = new_demux_packet_from(sd->data, sd->size);
cc->pts = vd->codec_pts;
cc->dts = vd->codec_dts;
cc->pos = -1;
demuxer_feed_caption(vd->header, cc);
}
struct mp_image *mpi = mp_image_from_av_frame(ctx->pic);
if (!mpi) {
av_frame_unref(ctx->pic);
return;
}
assert(mpi->planes[0] || mpi->planes[3]);
mpi->pts = mp_pts_from_av(ctx->pic->pkt_pts, &ctx->codec_timebase);
mpi->dts = mp_pts_from_av(ctx->pic->pkt_dts, &ctx->codec_timebase);
struct mp_image_params params;
update_image_params(vd, ctx->pic, &params);
mp_image_set_params(mpi, &params);
av_frame_unref(ctx->pic);
MP_TARRAY_APPEND(ctx, ctx->delay_queue, ctx->num_delay_queue, mpi);
if (ctx->num_delay_queue > ctx->max_delay_queue)
*out_image = read_output(vd);
}
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;
decode(vd, packet, flags, &mpi);
if (ctx->hwdec_failed) {
// Failed hardware decoding? Try again in software.
force_fallback(vd);
if (ctx->avctx)
decode(vd, packet, flags, &mpi);
}
if (mpi && !ctx->hwdec_notified && vd->opts->hwdec_api != HWDEC_NONE) {
if (ctx->hwdec) {
MP_INFO(vd, "Using hardware decoding (%s).\n",
m_opt_choice_str(mp_hwdec_names, ctx->hwdec->type));
} else {
MP_INFO(vd, "Using software decoding.\n");
}
ctx->hwdec_notified = true;
}
return mpi;
}
static int control(struct dec_video *vd, int cmd, void *arg)
{
vd_ffmpeg_ctx *ctx = vd->priv;
switch (cmd) {
case VDCTRL_RESET:
flush_all(vd);
return CONTROL_TRUE;
case VDCTRL_GET_BFRAMES: {
AVCodecContext *avctx = ctx->avctx;
if (!avctx)
break;
if (ctx->hwdec && ctx->hwdec->type == HWDEC_RPI)
break; // MMAL has arbitrary buffering, thus unknown
*(int *)arg = avctx->has_b_frames;
return CONTROL_TRUE;
}
case VDCTRL_GET_HWDEC: {
*(int *)arg = ctx->hwdec ? ctx->hwdec->type : 0;
return CONTROL_TRUE;
}
case VDCTRL_FORCE_HWDEC_FALLBACK:
if (ctx->hwdec) {
force_fallback(vd);
return ctx->avctx ? CONTROL_OK : CONTROL_ERROR;
}
return CONTROL_FALSE;
case VDCTRL_REINIT:
reinit(vd);
return CONTROL_TRUE;
}
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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