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mpv/video/decode/vd_lavc.c
wm4 6a4a5595d8 options: remove OPT_FLAG_CONSTANTS 
This means use of the min/max fields can be dropped for the flag option
type, which makes some things slightly easier. I'm also not sure if the
client API handled the case of flag not being 0 or 1 correctly, and this
change gets rid of this concern.
2014-06-13 02:10:45 +02:00

718 lines
22 KiB
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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/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 int get_buffer2_hwdec(AVCodecContext *avctx, AVFrame *pic, int flags);
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 vd_lavc_params
struct vd_lavc_params {
int fast;
int show_all;
int skip_loop_filter;
int skip_idct;
int skip_frame;
int threads;
int bitexact;
int check_hw_profile;
char *avopt;
};
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_INTRANGE("threads", threads, 0, 0, 16),
OPT_FLAG("bitexact", bitexact, 0),
OPT_FLAG("check-hw-profile", check_hw_profile, 0),
OPT_STRING("o", avopt, 0),
{0}
},
.size = sizeof(struct vd_lavc_params),
.defaults = &(const struct vd_lavc_params){
.show_all = 0,
.check_hw_profile = 1,
.skip_loop_filter = AVDISCARD_DEFAULT,
.skip_idct = AVDISCARD_DEFAULT,
.skip_frame = AVDISCARD_DEFAULT,
},
};
const struct vd_lavc_hwdec mp_vd_lavc_vdpau;
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 *const hwdec_list[] = {
#if HAVE_VDPAU_HWACCEL
&mp_vd_lavc_vdpau,
#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;
}
// 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 == 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)
{
int r = 0;
if (hwdec->probe)
r = hwdec->probe(hwdec, info, decoder);
return r;
}
static struct vd_lavc_hwdec *probe_hwdec(struct dec_video *vd, bool autoprobe,
enum hwdec_type api,
const char *decoder)
{
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(hwdec, &vd->hwdec_info, decoder);
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 '%s' not found in "
"libavcodec.\n", decoder);
} else if (r == HWDEC_ERR_NO_CTX && !autoprobe) {
MP_WARN(vd, "VO does not support requested hardware decoder.\n");
}
return NULL;
}
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->selected_hwdec = vd->opts->hwdec_api;
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;
if (hwdec_codec_allowed(vd, decoder)) {
if (vd->opts->hwdec_api == HWDEC_AUTO) {
for (int n = 0; hwdec_list[n]; n++) {
hwdec = probe_hwdec(vd, true, hwdec_list[n]->type, decoder);
if (hwdec)
break;
}
} else if (vd->opts->hwdec_api != HWDEC_NONE) {
hwdec = probe_hwdec(vd, false, vd->opts->hwdec_api, 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);
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;
}
}
if (ctx->avctx->bit_rate != 0)
vd->bitrate = ctx->avctx->bit_rate;
return 1;
}
static void set_from_bih(AVCodecContext *avctx, uint32_t format,
MP_BITMAPINFOHEADER *bih)
{
if (bih->biSize > sizeof(*bih))
mp_lavc_set_extradata(avctx, bih + 1, bih->biSize - sizeof(*bih));
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 vd_lavc_params *lavc_param = vd->opts->vd_lavc_params;
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->pix_fmt = AV_PIX_FMT_NONE;
ctx->hwdec = hwdec;
ctx->hwdec_fmt = 0;
ctx->avctx = avcodec_alloc_context3(lavc_codec);
AVCodecContext *avctx = ctx->avctx;
avctx->bit_rate = 0;
avctx->opaque = vd;
avctx->codec_type = AVMEDIA_TYPE_VIDEO;
avctx->codec_id = lavc_codec->id;
avctx->refcounted_frames = 1;
ctx->pic = av_frame_alloc();
if (ctx->hwdec) {
avctx->thread_count = 1;
avctx->get_format = get_format_hwdec;
avctx->get_buffer2 = get_buffer2_hwdec;
if (ctx->hwdec->init(ctx) < 0) {
uninit_avctx(vd);
return;
}
} else {
mp_set_avcodec_threads(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) {
#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 = lavc_param->skip_loop_filter;
avctx->skip_idct = lavc_param->skip_idct;
avctx->skip_frame = lavc_param->skip_frame;
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 (ctx->hwdec && ctx->hwdec->uninit)
ctx->hwdec->uninit(ctx);
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);
av_frame_free(&ctx->pic);
}
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;
struct MPOpts *opts = ctx->opts;
int width = frame->width;
int height = frame->height;
float aspect = av_q2d(frame->sample_aspect_ratio) * width / height;
int pix_fmt = frame->format;
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),
.rotate = vd->header->video->rotate,
};
if (opts->video_rotate < 0) {
out_params->rotate = 0;
} else {
out_params->rotate = (out_params->rotate + opts->video_rotate) % 360;
}
}
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);
if (ctx->hwdec->image_format) {
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->width ||
ctx->hwdec_h != avctx->height ||
ctx->hwdec_fmt != ctx->hwdec->image_format ||
ctx->hwdec_profile != avctx->profile;
ctx->hwdec_w = avctx->width;
ctx->hwdec_h = avctx->height;
ctx->hwdec_fmt = ctx->hwdec->image_format;
ctx->hwdec_profile = avctx->profile;
if (ctx->hwdec->init_decoder && change) {
if (ctx->hwdec->init_decoder(ctx, ctx->hwdec_fmt,
ctx->hwdec_w, ctx->hwdec_h) < 0)
{
ctx->hwdec_fmt = 0;
break;
}
}
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) || !ctx->hwdec)
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;
if (ctx->hwdec->init_decoder) {
if (imgfmt != ctx->hwdec_fmt && w != ctx->hwdec_w && h != ctx->hwdec_h)
return NULL;
}
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;
}
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 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);
struct mp_image *mpi = mp_image_from_av_frame(ctx->pic);
av_frame_unref(ctx->pic);
if (!mpi)
return 0;
assert(mpi->planes[0] || mpi->planes[3]);
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_GET_HWDEC: {
int hwdec = ctx->selected_hwdec;
if (!ctx->software_fallback_decoder)
hwdec = 0;
*(int *)arg = hwdec;
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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