mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 23:02:37 +00:00
68ff8a0484
bstr.c doesn't really deserve its own directory, and compat had just a few files, most of which may as well be in osdep. There isn't really any justification for these extra directories, so get rid of them. The compat/libav.h was empty - just delete it. We changed our approach to API compatibility, and will likely not need it anymore.
294 lines
7.7 KiB
C
294 lines
7.7 KiB
C
/*
|
|
* 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 <stdlib.h>
|
|
#include <assert.h>
|
|
|
|
#include <libavcodec/avcodec.h>
|
|
#include <libavutil/intreadwrite.h>
|
|
#include <libavutil/common.h>
|
|
|
|
#include "config.h"
|
|
|
|
#include "talloc.h"
|
|
#include "common/msg.h"
|
|
#include "common/av_common.h"
|
|
#include "misc/bstr.h"
|
|
#include "sd.h"
|
|
|
|
#define HAVE_AV_WEBVTT (LIBAVCODEC_VERSION_MICRO >= 100)
|
|
|
|
struct sd_lavc_priv {
|
|
AVCodecContext *avctx;
|
|
};
|
|
|
|
static const char *get_lavc_format(const char *format)
|
|
{
|
|
// For the hack involving parse_webvtt().
|
|
if (format && strcmp(format, "webvtt-webm") == 0)
|
|
format = "webvtt";
|
|
return format;
|
|
}
|
|
|
|
static bool supports_format(const char *format)
|
|
{
|
|
format = get_lavc_format(format);
|
|
enum AVCodecID cid = mp_codec_to_av_codec_id(format);
|
|
const AVCodecDescriptor *desc = avcodec_descriptor_get(cid);
|
|
if (!desc)
|
|
return false;
|
|
// These are known to support AVSubtitleRect->ass.
|
|
const char *whitelist[] =
|
|
{"text", "ass", "ssa", "srt", "subrip", "microdvd", "mpl2",
|
|
"jacosub", "pjs", "sami", "realtext", "subviewer", "subviewer1",
|
|
"vplayer", "webvtt", 0};
|
|
for (int n = 0; whitelist[n]; n++) {
|
|
if (strcmp(format, whitelist[n]) == 0)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Disable style definitions generated by the libavcodec converter.
|
|
// We always want the user defined style instead.
|
|
static void disable_styles(bstr header)
|
|
{
|
|
while (header.len) {
|
|
int n = bstr_find(header, bstr0("\nStyle: "));
|
|
if (n < 0)
|
|
break;
|
|
header.start[n + 1] = '#'; // turn into a comment
|
|
header = bstr_cut(header, 2);
|
|
}
|
|
}
|
|
|
|
static int init(struct sd *sd)
|
|
{
|
|
struct sd_lavc_priv *priv = talloc_zero(NULL, struct sd_lavc_priv);
|
|
AVCodecContext *avctx = NULL;
|
|
const char *fmt = get_lavc_format(sd->codec);
|
|
AVCodec *codec = avcodec_find_decoder(mp_codec_to_av_codec_id(fmt));
|
|
if (!codec)
|
|
goto error;
|
|
avctx = avcodec_alloc_context3(codec);
|
|
if (!avctx)
|
|
goto error;
|
|
avctx->extradata_size = sd->extradata_len;
|
|
avctx->extradata = sd->extradata;
|
|
if (avcodec_open2(avctx, codec, NULL) < 0)
|
|
goto error;
|
|
// Documented as "set by libavcodec", but there is no other way
|
|
avctx->time_base = (AVRational) {1, 1000};
|
|
priv->avctx = avctx;
|
|
sd->priv = priv;
|
|
sd->output_codec = "ssa";
|
|
sd->output_extradata = avctx->subtitle_header;
|
|
sd->output_extradata_len = avctx->subtitle_header_size;
|
|
if (sd->output_extradata) {
|
|
sd->output_extradata = talloc_memdup(sd, sd->output_extradata,
|
|
sd->output_extradata_len);
|
|
disable_styles((bstr){sd->output_extradata, sd->output_extradata_len});
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
MP_FATAL(sd, "Could not open libavcodec subtitle converter\n");
|
|
av_free(avctx);
|
|
talloc_free(priv);
|
|
return -1;
|
|
}
|
|
|
|
#if HAVE_AV_WEBVTT
|
|
|
|
// FFmpeg WebVTT packets are pre-parsed in some way. The FFmpeg Matroska
|
|
// demuxer does this on its own. In order to free our demuxer_mkv.c from
|
|
// codec-specific crud, we do this here.
|
|
// Copied from libavformat/matroskadec.c (FFmpeg 818ebe9 / 2013-08-19)
|
|
// License: LGPL v2.1 or later
|
|
// Author header: The FFmpeg Project
|
|
// Modified in some ways.
|
|
static int parse_webvtt(AVPacket *in, AVPacket *pkt)
|
|
{
|
|
uint8_t *id, *settings, *text, *buf;
|
|
int id_len, settings_len, text_len;
|
|
uint8_t *p, *q;
|
|
int err;
|
|
|
|
uint8_t *data = in->data;
|
|
int data_len = in->size;
|
|
|
|
if (data_len <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
p = data;
|
|
q = data + data_len;
|
|
|
|
id = p;
|
|
id_len = -1;
|
|
while (p < q) {
|
|
if (*p == '\r' || *p == '\n') {
|
|
id_len = p - id;
|
|
if (*p == '\r')
|
|
p++;
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if (p >= q || *p != '\n')
|
|
return AVERROR_INVALIDDATA;
|
|
p++;
|
|
|
|
settings = p;
|
|
settings_len = -1;
|
|
while (p < q) {
|
|
if (*p == '\r' || *p == '\n') {
|
|
settings_len = p - settings;
|
|
if (*p == '\r')
|
|
p++;
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if (p >= q || *p != '\n')
|
|
return AVERROR_INVALIDDATA;
|
|
p++;
|
|
|
|
text = p;
|
|
text_len = q - p;
|
|
while (text_len > 0) {
|
|
const int len = text_len - 1;
|
|
const uint8_t c = p[len];
|
|
if (c != '\r' && c != '\n')
|
|
break;
|
|
text_len = len;
|
|
}
|
|
|
|
if (text_len <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
err = av_new_packet(pkt, text_len);
|
|
if (err < 0)
|
|
return AVERROR(err);
|
|
|
|
memcpy(pkt->data, text, text_len);
|
|
|
|
if (id_len > 0) {
|
|
buf = av_packet_new_side_data(pkt,
|
|
AV_PKT_DATA_WEBVTT_IDENTIFIER,
|
|
id_len);
|
|
if (buf == NULL) {
|
|
av_free_packet(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(buf, id, id_len);
|
|
}
|
|
|
|
if (settings_len > 0) {
|
|
buf = av_packet_new_side_data(pkt,
|
|
AV_PKT_DATA_WEBVTT_SETTINGS,
|
|
settings_len);
|
|
if (buf == NULL) {
|
|
av_free_packet(pkt);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(buf, settings, settings_len);
|
|
}
|
|
|
|
pkt->pts = in->pts;
|
|
pkt->duration = in->duration;
|
|
pkt->convergence_duration = in->convergence_duration;
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
static int parse_webvtt(AVPacket *in, AVPacket *pkt)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
#endif
|
|
|
|
static void decode(struct sd *sd, struct demux_packet *packet)
|
|
{
|
|
struct sd_lavc_priv *priv = sd->priv;
|
|
AVCodecContext *avctx = priv->avctx;
|
|
AVSubtitle sub = {0};
|
|
AVPacket pkt;
|
|
AVPacket parsed_pkt = {0};
|
|
int ret, got_sub;
|
|
|
|
mp_set_av_packet(&pkt, packet, &avctx->time_base);
|
|
|
|
if (sd->codec && strcmp(sd->codec, "webvtt-webm") == 0) {
|
|
if (parse_webvtt(&pkt, &parsed_pkt) < 0) {
|
|
MP_ERR(sd, "Error parsing subtitle\n");
|
|
goto done;
|
|
}
|
|
pkt = parsed_pkt;
|
|
}
|
|
|
|
ret = avcodec_decode_subtitle2(avctx, &sub, &got_sub, &pkt);
|
|
if (ret < 0) {
|
|
MP_ERR(sd, "Error decoding subtitle\n");
|
|
} else if (got_sub) {
|
|
for (int i = 0; i < sub.num_rects; i++) {
|
|
char *ass_line = sub.rects[i]->ass;
|
|
if (!ass_line)
|
|
break;
|
|
// This might contain embedded timestamps, using the "old" ffmpeg
|
|
// ASS packet format, in which case pts/duration might be ignored
|
|
// at a later point.
|
|
sd_conv_add_packet(sd, ass_line, strlen(ass_line),
|
|
packet->pts, packet->duration);
|
|
}
|
|
}
|
|
|
|
done:
|
|
avsubtitle_free(&sub);
|
|
av_free_packet(&parsed_pkt);
|
|
}
|
|
|
|
static void reset(struct sd *sd)
|
|
{
|
|
struct sd_lavc_priv *priv = sd->priv;
|
|
|
|
avcodec_flush_buffers(priv->avctx);
|
|
sd_conv_def_reset(sd);
|
|
}
|
|
|
|
static void uninit(struct sd *sd)
|
|
{
|
|
struct sd_lavc_priv *priv = sd->priv;
|
|
|
|
avcodec_close(priv->avctx);
|
|
av_free(priv->avctx);
|
|
talloc_free(priv);
|
|
}
|
|
|
|
const struct sd_functions sd_lavc_conv = {
|
|
.name = "lavc_conv",
|
|
.supports_format = supports_format,
|
|
.init = init,
|
|
.decode = decode,
|
|
.get_converted = sd_conv_def_get_converted,
|
|
.reset = reset,
|
|
.uninit = uninit,
|
|
};
|