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mpv/video/decode/vd_lavc.c
wm4 ac266da658 vo_opengl: handle chroma location 
Use the video decoder chroma location flags and render chroma locations
other than centered. Until now, we've always used the intuitive and
obvious centered chroma location, but H.264 uses something else.

FFmpeg provides a small overview in libavcodec/avcodec.h:

-----------
/**
 *  X   X      3 4 X      X are luma samples,
 *             1 2        1-6 are possible chroma positions
 *  X   X      5 6 X      0 is undefined/unknown position
 */
enum AVChromaLocation{
    AVCHROMA_LOC_UNSPECIFIED = 0,
    AVCHROMA_LOC_LEFT        = 1, ///< mpeg2/4, h264 default
    AVCHROMA_LOC_CENTER      = 2, ///< mpeg1, jpeg, h263
    AVCHROMA_LOC_TOPLEFT     = 3, ///< DV
    AVCHROMA_LOC_TOP         = 4,
    AVCHROMA_LOC_BOTTOMLEFT  = 5,
    AVCHROMA_LOC_BOTTOM      = 6,
    AVCHROMA_LOC_NB             , ///< Not part of ABI
};
-----------

The visual difference is literally minimal, but since videophiles
apparently consider this detail as quality mark of a video renderer,
support it anyway. We don't bother with chroma locations other than
centered and left, though.

Not sure about correctness, but it's probably ok.
2013-06-28 21:20:41 +02:00

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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 "core/av_common.h"
#include "core/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 "demux/stheader.h"
#include "demux/demux_packet.h"
#include "osdep/numcores.h"
#include "video/csputils.h"
#include "libavcodec/avcodec.h"
#include "lavc.h"
#if AVPALETTE_SIZE != MP_PALETTE_SIZE
#error palette too large, adapt video/mp_image.h:MP_PALETTE_SIZE
#endif
#include "core/m_option.h"
static void init_avctx(sh_video_t *sh, const char *decoder, struct hwdec *hwdec);
static void uninit_avctx(sh_video_t *sh);
static void setup_refcounting_hw(struct AVCodecContext *s);
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);
#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_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;
const 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;
}
static bool hwdec_codec_allowed(sh_video_t *sh, struct hwdec *hwdec)
{
bstr s = bstr0(sh->opts->hwdec_codecs);
while (s.len) {
bstr item;
bstr_split_tok(s, ",", &item, &s);
if (bstr_equals0(item, "all") || bstr_equals0(item, hwdec->codec))
return true;
}
return false;
}
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, const char *decoder)
{
vd_ffmpeg_ctx *ctx;
ctx = sh->context = talloc_zero(NULL, vd_ffmpeg_ctx);
ctx->non_dr1_pool = talloc_steal(ctx, mp_image_pool_new(16));
struct hwdec *hwdec = find_hwcodec(sh->opts->hwdec_api, decoder);
struct hwdec *use_hwdec = NULL;
if (hwdec && hwdec_codec_allowed(sh, hwdec)) {
AVCodec *lavc_hwcodec = avcodec_find_decoder_by_name(hwdec->hw_codec);
if (lavc_hwcodec) {
ctx->software_fallback_decoder = talloc_strdup(ctx, decoder);
decoder = lavc_hwcodec->name;
use_hwdec = hwdec;
} else {
mp_tmsg(MSGT_DECVIDEO, MSGL_WARN, "Decoder '%s' not found in "
"libavcodec, using software decoding.\n", hwdec->hw_codec);
}
}
init_avctx(sh, decoder, use_hwdec);
if (!ctx->avctx) {
if (ctx->software_fallback_decoder) {
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Error initializing hardware "
"decoding, falling back to software decoding.\n");
decoder = ctx->software_fallback_decoder;
ctx->software_fallback_decoder = NULL;
init_avctx(sh, decoder, NULL);
}
if (!ctx->avctx) {
uninit(sh);
return 0;
}
}
return 1;
}
static void set_from_bih(AVCodecContext *avctx, uint32_t format,
BITMAPINFOHEADER *bih)
{
switch (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 (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 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 (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 == mmioFOURCC('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(sh_video_t *sh, const char *decoder, struct hwdec *hwdec)
{
vd_ffmpeg_ctx *ctx = sh->context;
struct lavc_param *lavc_param = &sh->opts->lavc_param;
bool mp_rawvideo = false;
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->do_dr1 = ctx->do_hw_dr1 = 0;
ctx->pix_fmt = PIX_FMT_NONE;
ctx->vo_initialized = 0;
ctx->hwdec = hwdec;
ctx->pic = avcodec_alloc_frame();
ctx->avctx = avcodec_alloc_context3(lavc_codec);
AVCodecContext *avctx = ctx->avctx;
avctx->opaque = sh;
avctx->codec_type = AVMEDIA_TYPE_VIDEO;
avctx->codec_id = lavc_codec->id;
avctx->thread_count = lavc_param->threads;
// Hack to allow explicitly selecting vdpau hw decoders
if (!hwdec && (lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) {
ctx->hwdec = talloc(ctx, struct hwdec);
*ctx->hwdec = (struct hwdec) {
.api = HWDEC_VDPAU,
.codec = sh->gsh->codec,
.hw_codec = decoder,
};
}
if (ctx->hwdec && ctx->hwdec->api == HWDEC_VDPAU) {
assert(lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU);
ctx->do_hw_dr1 = true;
avctx->thread_count = 1;
avctx->get_format = get_format_hwdec;
setup_refcounting_hw(avctx);
if (ctx->hwdec->api == HWDEC_VDPAU) {
avctx->draw_horiz_band = draw_slice_hwdec;
avctx->slice_flags =
SLICE_FLAG_CODED_ORDER | SLICE_FLAG_ALLOW_FIELD;
}
} else {
#if HAVE_AVUTIL_REFCOUNTING
avctx->refcounted_frames = 1;
#else
if (lavc_codec->capabilities & CODEC_CAP_DR1) {
ctx->do_dr1 = true;
avctx->get_buffer = mp_codec_get_buffer;
avctx->release_buffer = mp_codec_release_buffer;
}
#endif
}
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->flags2 |= lavc_param->fast;
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_avctx(sh);
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->disp_w;
avctx->coded_height = sh->disp_h;
// demux_avi only
avctx->stream_codec_tag = sh->video.fccHandler;
// demux_mkv, demux_avi, demux_asf
if (sh->bih)
set_from_bih(avctx, sh->format, sh->bih);
if (mp_rawvideo && sh->format >= IMGFMT_START && sh->format < IMGFMT_END) {
avctx->pix_fmt = imgfmt2pixfmt(sh->format);
avctx->codec_tag = 0;
}
if (sh->gsh->lav_headers)
mp_copy_lav_codec_headers(avctx, sh->gsh->lav_headers);
/* 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;
}
}
static void uninit_avctx(sh_video_t *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
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(&ctx->avctx);
avcodec_free_frame(&ctx->pic);
#if !HAVE_AVUTIL_REFCOUNTING
mp_buffer_pool_free(&ctx->dr1_buffer_pool);
#endif
}
static void uninit(sh_video_t *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
uninit_avctx(sh);
talloc_free(ctx);
}
static int init_vo(sh_video_t *sh, AVFrame *frame)
{
vd_ffmpeg_ctx *ctx = sh->context;
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
/* 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(frame->sample_aspect_ratio, ctx->last_sample_aspect_ratio) ||
width != sh->disp_w || height != sh->disp_h ||
pix_fmt != ctx->pix_fmt || !ctx->vo_initialized)
{
mp_image_pool_clear(ctx->non_dr1_pool);
ctx->vo_initialized = 0;
mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", aspect);
// Do not overwrite s->aspect on the first call, so that a container
// aspect if available is preferred.
// But set it even if the sample aspect did not change, since a
// resolution change can cause an aspect change even if the
// _sample_ aspect is unchanged.
if (sh->aspect == 0 || ctx->last_sample_aspect_ratio.den)
sh->aspect = aspect;
ctx->last_sample_aspect_ratio = frame->sample_aspect_ratio;
sh->disp_w = width;
sh->disp_h = height;
ctx->pix_fmt = pix_fmt;
ctx->best_csp = pixfmt2imgfmt(pix_fmt);
ctx->image_params = (struct mp_image_params) {
.imgfmt = ctx->best_csp,
.w = width,
.h = height,
// Ideally, we should also set aspect ratio, but we aren't there yet
// - so vd.c calculates display size from sh->aspect.
.d_w = width,
.d_h = height,
.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),
};
if (mpcodecs_reconfig_vo(sh, &ctx->image_params) < 0)
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_surface_hwdec(struct sh_video *sh, AVFrame *pic)
{
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(pic->format);
if (!IMGFMT_IS_HWACCEL(imgfmt))
return NULL;
// Video with non mod-16 width/height will have allocation sizes that are
// rounded up. This conflicts with our video size change detection and
// leads to an endless loop. On the other hand, vdpau seems to round up
// frame allocations internally. So use the original video resolution
// instead.
AVFrame pic_resized = *pic;
pic_resized.width = ctx->avctx->width;
pic_resized.height = ctx->avctx->height;
if (init_vo(sh, &pic_resized) < 0)
return NULL;
assert(IMGFMT_IS_HWACCEL(ctx->best_csp));
struct mp_image *mpi = NULL;
struct vf_instance *vf = sh->vfilter;
vf->control(vf, VFCTRL_HWDEC_ALLOC_SURFACE, &mpi);
if (mpi) {
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)
{
sh_video_t *sh = avctx->opaque;
struct mp_image *mpi = get_surface_hwdec(sh, 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;
avctx->refcounted_frames = 1;
}
#else /* HAVE_AVUTIL_REFCOUNTING */
static int get_buffer_hwdec(AVCodecContext *avctx, AVFrame *pic)
{
sh_video_t *sh = avctx->opaque;
struct mp_image *mpi = get_surface_hwdec(sh, 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 sh_video *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
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 sh_video *sh)
{
vd_ffmpeg_ctx *ctx = sh->context;
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 sh_video *sh, struct demux_packet *packet,
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;
mp_set_av_packet(&pkt, packet);
// 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;
if (!got_picture)
return 0; // skipped image
if (init_vo(sh, pic) < 0)
return -1;
struct mp_image *mpi = image_from_decoder(sh);
assert(mpi->planes[0]);
mpi->colorspace = ctx->image_params.colorspace;
mpi->levels = ctx->image_params.colorlevels;
mpi->chroma_location = ctx->image_params.chroma_location;
*out_image = mpi;
return 1;
}
static struct mp_image *decode_with_fallback(struct sh_video *sh,
struct demux_packet *packet,
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, flags, reordered_pts, &mpi);
if (res >= 0)
return mpi;
// Failed hardware decoding? Try again in software.
if (ctx->software_fallback_decoder) {
uninit_avctx(sh);
sh->vf_initialized = 0;
mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Error using hardware "
"decoding, falling back to software decoding.\n");
const char *decoder = ctx->software_fallback_decoder;
ctx->software_fallback_decoder = NULL;
init_avctx(sh, decoder, NULL);
if (ctx->avctx) {
mpi = NULL;
decode(sh, packet, 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;
assert(delay >= 0);
if (avctx->active_thread_type & FF_THREAD_FRAME)
delay += avctx->thread_count - 1;
*(int *)arg = delay;
return CONTROL_TRUE;
case VDCTRL_REINIT_VO:
if (ctx->vo_initialized)
mpcodecs_reconfig_vo(sh, &ctx->image_params);
return 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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