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mpv/video/decode/vd_lavc.c

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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/hwcontext.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 LIBAVCODEC_VERSION_MICRO >= 100
#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_vdpau_copy;
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_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;
extern const struct vd_lavc_hwdec mp_vd_lavc_cuda;
#if HAVE_RPI
static const struct vd_lavc_hwdec mp_vd_lavc_rpi = {
.type = HWDEC_RPI,
.lavc_suffix = "_mmal",
.image_format = IMGFMT_MMAL,
};
static const struct vd_lavc_hwdec mp_vd_lavc_rpi_copy = {
.type = HWDEC_RPI_COPY,
.lavc_suffix = "_mmal",
.copying = true,
};
#endif
#if HAVE_ANDROID
static const struct vd_lavc_hwdec mp_vd_lavc_mediacodec = {
.type = HWDEC_MEDIACODEC,
.lavc_suffix = "_mediacodec",
.copying = true,
};
#endif
#if HAVE_CUDA_HWACCEL
static const struct vd_lavc_hwdec mp_vd_lavc_cuda_copy = {
.type = HWDEC_CUDA_COPY,
.lavc_suffix = "_cuvid",
.copying = true,
};
#endif
static const struct vd_lavc_hwdec mp_vd_lavc_crystalhd = {
.type = HWDEC_CRYSTALHD,
.lavc_suffix = "_crystalhd",
.copying = true,
};
#if HAVE_VAAPI_HWACCEL
#if HAVE_VAAPI_HWACCEL_NEW
const struct vd_lavc_hwdec mp_vd_lavc_vaapi = {
.type = HWDEC_VAAPI,
.image_format = IMGFMT_VAAPI,
.generic_hwaccel = true,
.static_pool = true,
.pixfmt_map = (const enum AVPixelFormat[][2]) {
{AV_PIX_FMT_YUV420P10, AV_PIX_FMT_P010},
{AV_PIX_FMT_YUV420P, AV_PIX_FMT_NV12},
{AV_PIX_FMT_NONE}
},
};
#include "video/vaapi.h"
const struct vd_lavc_hwdec mp_vd_lavc_vaapi_copy = {
.type = HWDEC_VAAPI_COPY,
.copying = true,
.image_format = IMGFMT_VAAPI,
.generic_hwaccel = true,
.static_pool = true,
.create_dev = va_create_standalone,
.pixfmt_map = (const enum AVPixelFormat[][2]) {
{AV_PIX_FMT_YUV420P10, AV_PIX_FMT_P010},
{AV_PIX_FMT_YUV420P, AV_PIX_FMT_NV12},
{AV_PIX_FMT_NONE}
},
};
#else
extern const struct vd_lavc_hwdec mp_vd_lavc_vaapi;
extern const struct vd_lavc_hwdec mp_vd_lavc_vaapi_copy;
#endif
#endif
static const struct vd_lavc_hwdec *const hwdec_list[] = {
#if HAVE_RPI
&mp_vd_lavc_rpi,
&mp_vd_lavc_rpi_copy,
#endif
#if HAVE_VDPAU_HWACCEL
&mp_vd_lavc_vdpau,
&mp_vd_lavc_vdpau_copy,
#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
#if HAVE_CUDA_HWACCEL
&mp_vd_lavc_cuda,
&mp_vd_lavc_cuda_copy,
#endif
&mp_vd_lavc_crystalhd,
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;
}
// 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)
{
switch (ctx->avctx->codec_id) {
case AV_CODEC_ID_H264:
case AV_CODEC_ID_HEVC:
return 16;
case AV_CODEC_ID_VP9:
return 8;
}
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 struct mp_hwdec_ctx *hwdec_create_dev(struct dec_video *vd,
struct vd_lavc_hwdec *hwdec,
bool autoprobe)
{
if (hwdec->create_dev)
return hwdec->create_dev(vd->global, vd->log, autoprobe);
if (vd->hwdec_devs) {
hwdec_devices_request(vd->hwdec_devs, hwdec->type);
return hwdec_devices_get(vd->hwdec_devs, hwdec->type);
}
return NULL;
}
static int hwdec_probe(struct dec_video *vd, struct vd_lavc_hwdec *hwdec,
const char *codec, bool autoprobe)
{
vd_ffmpeg_ctx *ctx = vd->priv;
int r = 0;
if (hwdec->probe)
r = hwdec->probe(ctx, hwdec, codec);
if (hwdec->generic_hwaccel) {
assert(!hwdec->probe && !hwdec->init && !hwdec->init_decoder &&
!hwdec->uninit && !hwdec->allocate_image && !hwdec->process_image);
struct mp_hwdec_ctx *dev = hwdec_create_dev(vd, hwdec, autoprobe);
if (!dev)
return hwdec->copying ? -1 : HWDEC_ERR_NO_CTX;
if (dev->emulated)
r = HWDEC_ERR_EMULATED;
if (hwdec->create_dev && dev->destroy)
dev->destroy(dev);
}
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) {
int level = autoprobe ? MSGL_V : MSGL_WARN;
MP_MSG(vd, level, "Requested hardware decoder not compiled.\n");
return NULL;
}
int r = hwdec_probe(vd, hwdec, codec, autoprobe);
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) {
const char *orig_decoder = decoder;
if (hwdec->lavc_suffix)
decoder = hwdec_find_decoder(codec, hwdec->lavc_suffix);
MP_VERBOSE(vd, "Trying hardware decoding.\n");
if (strcmp(orig_decoder, decoder) != 0)
MP_VERBOSE(vd, "Using underlying hw-decoder '%s'\n", decoder);
} 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;
ctx->hwdec_swpool = talloc_steal(ctx, mp_image_pool_new(17));
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;
struct mp_codec_params *c = vd->codec;
assert(!ctx->avctx);
if (strcmp(decoder, "mp-rawvideo") == 0)
decoder = "rawvideo";
AVCodec *lavc_codec = avcodec_find_decoder_by_name(decoder);
if (!lavc_codec)
return;
ctx->codec_timebase = mp_get_codec_timebase(vd->codec);
// This decoder does not read pkt_timebase correctly yet.
if (strstr(decoder, "_mmal"))
ctx->codec_timebase = (AVRational){1, 1000000};
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 LIBAVCODEC_VERSION_MICRO >= 100
avctx->pkt_timebase = ctx->codec_timebase;
#endif
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;
if (ctx->hwdec->generic_hwaccel) {
ctx->hwdec_dev = hwdec_create_dev(vd, ctx->hwdec, false);
if (!ctx->hwdec_dev)
goto error;
}
ctx->max_delay_queue = ctx->hwdec->delay_queue;
ctx->hw_probing = true;
} else {
mp_set_avcodec_threads(vd->log, avctx, lavc_param->threads);
}
avctx->flags |= lavc_param->bitexact ? AV_CODEC_FLAG_BITEXACT : 0;
avctx->flags2 |= lavc_param->fast ? AV_CODEC_FLAG2_FAST : 0;
if (lavc_param->show_all)
avctx->flags |= AV_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;
if (mp_set_avctx_codec_headers(avctx, c) < 0) {
MP_ERR(vd, "Could not set codec parameters.\n");
goto error;
}
/* 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;
for (int n = 0; n < ctx->num_sent_packets; n++)
talloc_free(ctx->sent_packets[n]);
ctx->num_sent_packets = 0;
for (int n = 0; n < ctx->num_requeue_packets; n++)
talloc_free(ctx->requeue_packets[n]);
ctx->num_requeue_packets = 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);
av_buffer_unref(&ctx->cached_hw_frames_ctx);
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_dev && ctx->hwdec && ctx->hwdec->generic_hwaccel &&
ctx->hwdec_dev->destroy)
ctx->hwdec_dev->destroy(ctx->hwdec_dev);
ctx->hwdec_dev = NULL;
if (ctx->hwdec && ctx->hwdec->uninit)
ctx->hwdec->uninit(ctx);
ctx->hwdec = NULL;
assert(ctx->hwdec_priv == NULL);
av_freep(&ctx->avctx);
ctx->hwdec_failed = false;
ctx->hwdec_fail_count = 0;
ctx->max_delay_queue = 0;
ctx->hw_probing = false;
}
static void update_image_params(struct dec_video *vd, AVFrame *frame,
struct mp_image_params *params)
{
vd_ffmpeg_ctx *ctx = vd->priv;
#if LIBAVCODEC_VERSION_MICRO >= 100
// 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
params->color.sig_peak = ctx->cached_hdr_peak;
params->rotate = vd->codec->rotate;
params->stereo_in = vd->codec->stereo_mode;
}
// Allocate and set AVCodecContext.hw_frames_ctx. Also caches them on redundant
// calls (useful because seeks issue get_format, which clears hw_frames_ctx).
// device_ctx: reference to an AVHWDeviceContext
// av_sw_format: AV_PIX_FMT_ for the underlying hardware frame format
// initial_pool_size: number of frames in the memory pool on creation
// Return >=0 on success, <0 on error.
int hwdec_setup_hw_frames_ctx(struct lavc_ctx *ctx, AVBufferRef *device_ctx,
int av_sw_format, int initial_pool_size)
{
int w = ctx->avctx->coded_width;
int h = ctx->avctx->coded_height;
int av_hw_format = imgfmt2pixfmt(ctx->hwdec_fmt);
if (ctx->cached_hw_frames_ctx) {
AVHWFramesContext *fctx = (void *)ctx->cached_hw_frames_ctx->data;
if (fctx->width != w || fctx->height != h ||
fctx->sw_format != av_sw_format ||
fctx->format != av_hw_format)
{
av_buffer_unref(&ctx->cached_hw_frames_ctx);
}
}
if (!ctx->cached_hw_frames_ctx) {
ctx->cached_hw_frames_ctx = av_hwframe_ctx_alloc(device_ctx);
if (!ctx->cached_hw_frames_ctx)
return -1;
AVHWFramesContext *fctx = (void *)ctx->cached_hw_frames_ctx->data;
fctx->format = av_hw_format;
fctx->sw_format = av_sw_format;
fctx->width = w;
fctx->height = h;
fctx->initial_pool_size = initial_pool_size;
int res = av_hwframe_ctx_init(ctx->cached_hw_frames_ctx);
if (res < 0) {
MP_ERR(ctx, "Failed to allocate hw frames.\n");
av_buffer_unref(&ctx->cached_hw_frames_ctx);
return -1;
}
}
assert(!ctx->avctx->hw_frames_ctx);
ctx->avctx->hw_frames_ctx = av_buffer_ref(ctx->cached_hw_frames_ctx);
return ctx->avctx->hw_frames_ctx ? 0 : -1;
}
static int init_generic_hwaccel(struct dec_video *vd)
{
struct lavc_ctx *ctx = vd->priv;
struct vd_lavc_hwdec *hwdec = ctx->hwdec;
if (!ctx->hwdec_dev)
return -1;
// libavcodec has no way yet to communicate the exact surface format needed
// for the frame pool, or the required minimum size of the frame pool.
// Hopefully, this weakness in the libavcodec API will be fixed in the
// future.
// For the pixel format, we try to second-guess from what the libavcodec
// software decoder would require (sw_pix_fmt). It could break and require
// adjustment if new hwaccel surface formats are added.
enum AVPixelFormat av_sw_format = AV_PIX_FMT_NONE;
for (int n = 0; hwdec->pixfmt_map[n][0] != AV_PIX_FMT_NONE; n++) {
if (ctx->avctx->sw_pix_fmt == hwdec->pixfmt_map[n][0]) {
av_sw_format = hwdec->pixfmt_map[n][1];
break;
}
}
if (av_sw_format == AV_PIX_FMT_NONE) {
MP_VERBOSE(ctx, "Unsupported hw decoding format: %s\n",
mp_imgfmt_to_name(pixfmt2imgfmt(ctx->avctx->sw_pix_fmt)));
return -1;
}
// The video output might not support all formats.
// Note that supported_formats==NULL means any are accepted.
int *render_formats = ctx->hwdec_dev->supported_formats;
if (render_formats) {
int mp_format = pixfmt2imgfmt(av_sw_format);
bool found = false;
for (int n = 0; render_formats[n]; n++) {
if (render_formats[n] == mp_format) {
found = true;
break;
}
}
if (!found) {
MP_WARN(ctx, "Surface format %s not supported for direct rendering.\n",
mp_imgfmt_to_name(mp_format));
return -1;
}
}
int pool_size = 0;
if (hwdec->static_pool)
pool_size = hwdec_get_max_refs(ctx) + HWDEC_EXTRA_SURFACES;
ctx->hwdec_fmt = hwdec->image_format;
return hwdec_setup_hw_frames_ctx(ctx, ctx->hwdec_dev->av_device_ref,
av_sw_format, pool_size);
}
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");
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);
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])) {
if (ctx->hwdec->generic_hwaccel) {
if (init_generic_hwaccel(vd) < 0)
break;
return 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->volatile_context;
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 AVERROR(EINVAL);
struct mp_image *mpi = ctx->hwdec->allocate_image(ctx, w, h);
if (!mpi)
return AVERROR(ENOMEM);
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 bool prepare_decoding(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVCodecContext *avctx = ctx->avctx;
struct vd_lavc_params *opts = ctx->opts->vd_lavc_params;
if (!avctx || ctx->hwdec_failed)
return false;
int drop = ctx->framedrop_flags;
if (drop) {
// hr-seek framedrop vs. normal framedrop
avctx->skip_frame = drop == 2 ? AVDISCARD_NONREF : opts->framedrop;
} else {
// normal playback
avctx->skip_frame = ctx->skip_frame;
}
if (ctx->hwdec_request_reinit)
reset_avctx(vd);
return true;
}
static void handle_err(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
struct vd_lavc_params *opts = ctx->opts->vd_lavc_params;
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;
}
}
static bool do_send_packet(struct dec_video *vd, struct demux_packet *pkt)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVCodecContext *avctx = ctx->avctx;
if (!prepare_decoding(vd))
return false;
AVPacket avpkt;
mp_set_av_packet(&avpkt, pkt, &ctx->codec_timebase);
int ret = avcodec_send_packet(avctx, pkt ? &avpkt : NULL);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return false;
if (ctx->hw_probing && ctx->num_sent_packets < 32) {
pkt = pkt ? demux_copy_packet(pkt) : NULL;
MP_TARRAY_APPEND(ctx, ctx->sent_packets, ctx->num_sent_packets, pkt);
}
if (ret < 0)
handle_err(vd);
return true;
}
static bool send_packet(struct dec_video *vd, struct demux_packet *pkt)
{
vd_ffmpeg_ctx *ctx = vd->priv;
if (ctx->num_requeue_packets) {
if (do_send_packet(vd, ctx->requeue_packets[0])) {
talloc_free(ctx->requeue_packets[0]);
MP_TARRAY_REMOVE_AT(ctx->requeue_packets, ctx->num_requeue_packets, 0);
}
return false;
}
return do_send_packet(vd, pkt);
}
// Returns whether decoder is still active (!EOF state).
static bool decode_frame(struct dec_video *vd)
{
vd_ffmpeg_ctx *ctx = vd->priv;
AVCodecContext *avctx = ctx->avctx;
if (!prepare_decoding(vd))
return true;
int ret = avcodec_receive_frame(avctx, ctx->pic);
if (ret == AVERROR_EOF) {
// If flushing was initialized earlier and has ended now, make it start
// over in case we get new packets at some point in the future.
reset_avctx(vd);
return false;
} else if (ret < 0 && ret != AVERROR(EAGAIN)) {
handle_err(vd);
}
if (!ctx->pic->buf[0])
return true;
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;
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 true;
}
assert(mpi->planes[0] || mpi->planes[3]);
mpi->pts = mp_pts_from_av(ctx->pic->pts, &ctx->codec_timebase);
mpi->dts = mp_pts_from_av(ctx->pic->pkt_dts, &ctx->codec_timebase);
#if LIBAVCODEC_VERSION_MICRO >= 100
mpi->pkt_duration =
mp_pts_from_av(av_frame_get_pkt_duration(ctx->pic), &ctx->codec_timebase);
#endif
update_image_params(vd, ctx->pic, &mpi->params);
av_frame_unref(ctx->pic);
MP_TARRAY_APPEND(ctx, ctx->delay_queue, ctx->num_delay_queue, mpi);
return true;
}
static bool receive_frame(struct dec_video *vd, struct mp_image **out_image)
{
vd_ffmpeg_ctx *ctx = vd->priv;
assert(!*out_image);
bool progress = decode_frame(vd);
if (ctx->hwdec_failed) {
// Failed hardware decoding? Try again in software.
struct demux_packet **pkts = ctx->sent_packets;
int num_pkts = ctx->num_sent_packets;
ctx->sent_packets = NULL;
ctx->num_sent_packets = 0;
force_fallback(vd);
ctx->requeue_packets = pkts;
ctx->num_requeue_packets = num_pkts;
}
if (!ctx->num_delay_queue)
return progress;
if (ctx->num_delay_queue <= ctx->max_delay_queue && progress)
return true;
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);
res = res ? mp_img_swap_to_native(res) : NULL;
if (!res)
return progress;
if (ctx->hwdec && ctx->hwdec->copying && (res->fmt.flags & MP_IMGFLAG_HWACCEL))
{
struct mp_image *sw = mp_image_hw_download(res, ctx->hwdec_swpool);
mp_image_unrefp(&res);
res = sw;
if (!res) {
MP_ERR(vd, "Could not copy back hardware decoded frame.\n");
ctx->hwdec_fail_count = INT_MAX - 1; // force fallback
handle_err(vd);
return NULL;
}
}
if (!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_VERBOSE(vd, "Using software decoding.\n");
}
ctx->hwdec_notified = true;
}
if (ctx->hw_probing) {
for (int n = 0; n < ctx->num_sent_packets; n++)
talloc_free(ctx->sent_packets[n]);
ctx->num_sent_packets = 0;
ctx->hw_probing = false;
}
*out_image = res;
return true;
}
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_SET_FRAMEDROP:
ctx->framedrop_flags = *(int *)arg;
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,
.send_packet = send_packet,
.receive_frame = receive_frame,
};
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