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sub: remove subtitle filter chain concept 

It was stupid. The only thing that still effectively used it was
sd_lavc_conv - all other "filters" were the subtitle decoder/renderers
for text (sd_ass) and bitmap (sd_lavc) subtitles.

While having a subtitle filter chain was interesting (and actually
worked in almost the same way as the audio/video ones), I didn't
manage to use it in a meaningful way, and I couldn't e.g. factor
secondary features like fixing subtitle timing into filters.

Refactor the shit and drop unneeded things as it goes.
This commit is contained in:
wm4 2015-12-18 01:54:14 +01:00
parent 2c7db48195
commit 687b552db1
6 changed files with 122 additions and 293 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

225
sub/dec_sub.c
View File

@ -34,19 +34,15 @@
extern const struct sd_functions sd_ass;
extern const struct sd_functions sd_lavc;
extern const struct sd_functions sd_lavc_conv;
static const struct sd_functions *const sd_list[] = {
&sd_lavc,
#if HAVE_LIBASS
&sd_ass,
#endif
&sd_lavc,
&sd_lavc_conv,
NULL
};
#define MAX_NUM_SD 3
struct dec_sub {
pthread_mutex_t lock;
@ -56,8 +52,7 @@ struct dec_sub {
struct sh_stream *sh;
struct sd *sd[MAX_NUM_SD];
int num_sd;
struct sd *sd;
};
struct packet_list {
@ -84,6 +79,7 @@ struct dec_sub *sub_create(struct mpv_global *global)
struct dec_sub *sub = talloc_zero(NULL, struct dec_sub);
sub->log = mp_log_new(sub, global->log, "sub");
sub->opts = global->opts;
sub->init_sd.opts = sub->opts;
mpthread_mutex_init_recursive(&sub->lock);
@ -93,12 +89,10 @@ struct dec_sub *sub_create(struct mpv_global *global)
static void sub_uninit(struct dec_sub *sub)
{
sub_reset(sub);
for (int n = 0; n < sub->num_sd; n++) {
if (sub->sd[n]->driver->uninit)
sub->sd[n]->driver->uninit(sub->sd[n]);
talloc_free(sub->sd[n]);
}
sub->num_sd = 0;
if (sub->sd)
sub->sd->driver->uninit(sub->sd);
talloc_free(sub->sd);
sub->sd = NULL;
}
void sub_destroy(struct dec_sub *sub)
@ -113,16 +107,11 @@ void sub_destroy(struct dec_sub *sub)
bool sub_is_initialized(struct dec_sub *sub)
{
pthread_mutex_lock(&sub->lock);
bool r = !!sub->num_sd;
bool r = !!sub->sd;
pthread_mutex_unlock(&sub->lock);
return r;
}
static struct sd *sub_get_last_sd(struct dec_sub *sub)
{
return sub->num_sd ? sub->sd[sub->num_sd - 1] : NULL;
}
void sub_set_video_res(struct dec_sub *sub, int w, int h)
{
pthread_mutex_lock(&sub->lock);
@ -138,14 +127,6 @@ void sub_set_video_fps(struct dec_sub *sub, double fps)
pthread_mutex_unlock(&sub->lock);
}
void sub_set_extradata(struct dec_sub *sub, void *data, int data_len)
{
pthread_mutex_lock(&sub->lock);
sub->init_sd.extradata = data_len ? talloc_memdup(sub, data, data_len) : NULL;
sub->init_sd.extradata_len = data_len;
pthread_mutex_unlock(&sub->lock);
}
void sub_set_ass_renderer(struct dec_sub *sub, struct ass_library *ass_library,
struct ass_renderer *ass_renderer,
pthread_mutex_t *ass_lock)
@ -157,22 +138,11 @@ void sub_set_ass_renderer(struct dec_sub *sub, struct ass_library *ass_library,
pthread_mutex_unlock(&sub->lock);
}
static void print_chain(struct dec_sub *sub)
{
MP_VERBOSE(sub, "Subtitle filter chain: ");
for (int n = 0; n < sub->num_sd; n++) {
struct sd *sd = sub->sd[n];
MP_VERBOSE(sub, "%s%s (%s)", n > 0 ? " -> " : "",
sd->driver->name, sd->codec);
}
MP_VERBOSE(sub, "\n");
}
static int sub_init_decoder(struct dec_sub *sub, struct sd *sd)
{
sd->driver = NULL;
for (int n = 0; sd_list[n]; n++) {
if (sd_list[n]->supports_format(sd->codec)) {
if (sd->sh->codec && sd_list[n]->supports_format(sd->sh->codec)) {
sd->driver = sd_list[n];
break;
}
@ -190,73 +160,30 @@ static int sub_init_decoder(struct dec_sub *sub, struct sd *sd)
void sub_init_from_sh(struct dec_sub *sub, struct sh_stream *sh)
{
assert(!sub->num_sd);
assert(!sub->sd);
assert(sh && sh->sub);
pthread_mutex_lock(&sub->lock);
sub->sh = sh;
if (sh->extradata && !sub->init_sd.extradata)
sub_set_extradata(sub, sh->extradata, sh->extradata_size);
struct sd init_sd = sub->init_sd;
init_sd.codec = sh->codec;
init_sd.sh = sh;
while (sub->num_sd < MAX_NUM_SD) {
struct sd *sd = talloc(NULL, struct sd);
*sd = init_sd;
sd->opts = sub->opts;
if (sub_init_decoder(sub, sd) < 0) {
talloc_free(sd);
break;
}
sub->sd[sub->num_sd] = sd;
sub->num_sd++;
// Try adding new converters until a decoder is reached
if (sd->driver->get_bitmaps || sd->driver->get_text) {
print_chain(sub);
pthread_mutex_unlock(&sub->lock);
return;
}
init_sd = (struct sd) {
.codec = sd->output_codec,
.converted_from = sd->codec,
.extradata = sd->output_extradata,
.extradata_len = sd->output_extradata_len,
.sh = sub->init_sd.sh,
.video_fps = sub->init_sd.video_fps,
.ass_library = sub->init_sd.ass_library,
.ass_renderer = sub->init_sd.ass_renderer,
.ass_lock = sub->init_sd.ass_lock,
};
}
struct sd *sd = talloc(NULL, struct sd);
*sd = init_sd;
sub_uninit(sub);
MP_ERR(sub, "Could not find subtitle decoder for format '%s'.\n",
sh->codec ? sh->codec : "<unknown>");
pthread_mutex_unlock(&sub->lock);
}
static struct demux_packet *get_decoded_packet(struct sd *sd)
{
return sd->driver->get_converted ? sd->driver->get_converted(sd) : NULL;
}
static void decode_chain(struct sd **sd, int num_sd, struct demux_packet *packet)
{
if (num_sd == 0)
if (sub_init_decoder(sub, sd) < 0) {
sd->driver->uninit(sd);
talloc_free(sd);
MP_ERR(sub, "Could not find subtitle decoder for format '%s'.\n",
sh->codec ? sh->codec : "<unknown>");
pthread_mutex_unlock(&sub->lock);
return;
struct sd *dec = sd[0];
dec->driver->decode(dec, packet);
if (num_sd > 1) {
while (1) {
struct demux_packet *next = get_decoded_packet(dec);
if (!next)
break;
decode_chain(sd + 1, num_sd - 1, next);
}
}
sub->sd = sd;
pthread_mutex_unlock(&sub->lock);
}
static struct demux_packet *recode_packet(struct mp_log *log,
@ -283,11 +210,11 @@ static struct demux_packet *recode_packet(struct mp_log *log,
static void decode_chain_recode(struct dec_sub *sub, struct demux_packet *packet)
{
if (sub->num_sd > 0) {
if (sub->sd) {
struct demux_packet *recoded = NULL;
if (sub->sh && sub->sh->sub->charset)
recoded = recode_packet(sub->log, packet, sub->sh->sub->charset);
decode_chain(sub->sd, sub->num_sd, recoded ? recoded : packet);
sub->sd->driver->decode(sub->sd, recoded ? recoded : packet);
talloc_free(recoded);
}
}
@ -301,9 +228,6 @@ void sub_decode(struct dec_sub *sub, struct demux_packet *packet)
static void add_sub_list(struct dec_sub *sub, struct packet_list *subs)
{
struct sd *sd = sub_get_last_sd(sub);
assert(sd);
for (int n = 0; n < subs->num_packets; n++)
decode_chain_recode(sub, subs->packets[n]);
}
@ -326,8 +250,7 @@ bool sub_read_all_packets(struct dec_sub *sub, struct sh_stream *sh)
pthread_mutex_lock(&sub->lock);
// Converters are assumed to always accept packets in advance
struct sd *sd = sub_get_last_sd(sub);
if (!(sd && sd->driver->accept_packets_in_advance)) {
if (!(sub->sd && sub->sd->driver->accept_packets_in_advance)) {
pthread_mutex_unlock(&sub->lock);
return false;
}
@ -353,10 +276,8 @@ bool sub_accepts_packet_in_advance(struct dec_sub *sub)
{
bool res = true;
pthread_mutex_lock(&sub->lock);
for (int n = 0; n < sub->num_sd; n++) {
if (sub->sd[n]->driver->accepts_packet)
res &= sub->sd[n]->driver->accepts_packet(sub->sd[n]);
}
if (sub->sd && sub->sd->driver->accepts_packet)
res &= sub->sd->driver->accepts_packet(sub->sd);
pthread_mutex_unlock(&sub->lock);
return res;
}
@ -368,22 +289,10 @@ void sub_get_bitmaps(struct dec_sub *sub, struct mp_osd_res dim, double pts,
struct sub_bitmaps *res)
{
struct MPOpts *opts = sub->opts;
struct sd *sd = sub_get_last_sd(sub);
*res = (struct sub_bitmaps) {0};
if (sd && opts->sub_visibility) {
if (sd->driver->get_bitmaps)
sd->driver->get_bitmaps(sd, dim, pts, res);
}
}
bool sub_has_get_text(struct dec_sub *sub)
{
pthread_mutex_lock(&sub->lock);
struct sd *sd = sub_get_last_sd(sub);
bool r = sd && sd->driver->get_text;
pthread_mutex_unlock(&sub->lock);
return r;
if (sub->sd && opts->sub_visibility && sub->sd->driver->get_bitmaps)
sub->sd->driver->get_bitmaps(sub->sd, dim, pts, res);
}
// See sub_get_bitmaps() for locking requirements.
@ -393,12 +302,9 @@ char *sub_get_text(struct dec_sub *sub, double pts)
{
pthread_mutex_lock(&sub->lock);
struct MPOpts *opts = sub->opts;
struct sd *sd = sub_get_last_sd(sub);
char *text = NULL;
if (sd && opts->sub_visibility) {
if (sd->driver->get_text)
text = sd->driver->get_text(sd, pts);
}
if (sub->sd && opts->sub_visibility && sub->sd->driver->get_text)
text = sub->sd->driver->get_text(sub->sd, pts);
pthread_mutex_unlock(&sub->lock);
return text;
}
@ -406,10 +312,8 @@ char *sub_get_text(struct dec_sub *sub, double pts)
void sub_reset(struct dec_sub *sub)
{
pthread_mutex_lock(&sub->lock);
for (int n = 0; n < sub->num_sd; n++) {
if (sub->sd[n]->driver->reset)
sub->sd[n]->driver->reset(sub->sd[n]);
}
if (sub->sd && sub->sd->driver->reset)
sub->sd->driver->reset(sub->sd);
pthread_mutex_unlock(&sub->lock);
}
@ -417,69 +321,8 @@ int sub_control(struct dec_sub *sub, enum sd_ctrl cmd, void *arg)
{
int r = CONTROL_UNKNOWN;
pthread_mutex_lock(&sub->lock);
for (int n = 0; n < sub->num_sd; n++) {
if (sub->sd[n]->driver->control) {
r = sub->sd[n]->driver->control(sub->sd[n], cmd, arg);
if (r != CONTROL_UNKNOWN)
break;
}
}
if (sub->sd && sub->sd->driver->control)
r = sub->sd->driver->control(sub->sd, cmd, arg);
pthread_mutex_unlock(&sub->lock);
return r;
}
#define MAX_PACKETS 10
#define MAX_BYTES 10000
struct sd_conv_buffer {
struct demux_packet pkt[MAX_PACKETS];
int num_pkt;
int read_pkt;
char buffer[MAX_BYTES];
int cur_buffer;
};
void sd_conv_add_packet(struct sd *sd, void *data, int data_len, double pts,
double duration, int64_t pos)
{
if (!sd->sd_conv_buffer)
sd->sd_conv_buffer = talloc_zero(sd, struct sd_conv_buffer);
struct sd_conv_buffer *buf = sd->sd_conv_buffer;
if (buf->num_pkt >= MAX_PACKETS || buf->cur_buffer + data_len + 1 > MAX_BYTES)
goto out_of_space;
if (buf->read_pkt == buf->num_pkt)
sd_conv_def_reset(sd);
assert(buf->read_pkt == 0); // no mixing of reading/adding allowed
struct demux_packet *pkt = &buf->pkt[buf->num_pkt++];
*pkt = (struct demux_packet) {
.buffer = &buf->buffer[buf->cur_buffer],
.len = data_len,
.pts = pts,
.duration = duration,
.pos = pos,
};
memcpy(pkt->buffer, data, data_len);
pkt->buffer[data_len] = 0;
buf->cur_buffer += data_len + 1;
return;
out_of_space:
MP_ERR(sd, "Subtitle too big.\n");
}
struct demux_packet *sd_conv_def_get_converted(struct sd *sd)
{
struct sd_conv_buffer *buf = sd->sd_conv_buffer;
if (buf && buf->read_pkt < buf->num_pkt)
return &buf->pkt[buf->read_pkt++];
return NULL;
}
void sd_conv_def_reset(struct sd *sd)
{
struct sd_conv_buffer *buf = sd->sd_conv_buffer;
if (buf) {
buf->read_pkt = buf->num_pkt = 0;
buf->cur_buffer = 0;
}
}

2
sub/dec_sub.h
View File

@ -31,7 +31,6 @@ void sub_unlock(struct dec_sub *sub);
void sub_set_video_res(struct dec_sub *sub, int w, int h);
void sub_set_video_fps(struct dec_sub *sub, double fps);
void sub_set_extradata(struct dec_sub *sub, void *data, int data_len);
void sub_set_ass_renderer(struct dec_sub *sub, struct ass_library *ass_library,
struct ass_renderer *ass_renderer,
pthread_mutex_t *ass_lock);
@ -44,7 +43,6 @@ bool sub_accepts_packet_in_advance(struct dec_sub *sub);
void sub_decode(struct dec_sub *sub, struct demux_packet *packet);
void sub_get_bitmaps(struct dec_sub *sub, struct mp_osd_res dim, double pts,
struct sub_bitmaps *res);
bool sub_has_get_text(struct dec_sub *sub);
char *sub_get_text(struct dec_sub *sub, double pts);
void sub_reset(struct dec_sub *sub);

37
sub/sd.h
View File

@ -16,18 +16,8 @@ struct sd {
const struct sd_functions *driver;
void *priv;
const char *codec;
// Extra header data passed from demuxer
char *extradata;
int extradata_len;
struct sh_stream *sh;
// Set to !=NULL if the input packets are being converted from another
// format.
const char *converted_from;
// Video resolution used for subtitle decoding. Doesn't necessarily match
// the resolution of the VO, nor does it have to be the OSD resolution.
int sub_video_w, sub_video_h;
@ -38,14 +28,6 @@ struct sd {
struct ass_library *ass_library;
struct ass_renderer *ass_renderer;
pthread_mutex_t *ass_lock;
// Set by sub converter
const char *output_codec;
char *output_extradata;
int output_extradata_len;
// Internal buffer for sd_conv_* functions
struct sd_conv_buffer *sd_conv_buffer;
};
struct sd_functions {
@ -60,21 +42,18 @@ struct sd_functions {
bool (*accepts_packet)(struct sd *sd); // implicit default if NULL: true
int (*control)(struct sd *sd, enum sd_ctrl cmd, void *arg);
// decoder
void (*get_bitmaps)(struct sd *sd, struct mp_osd_res dim, double pts,
struct sub_bitmaps *res);
char *(*get_text)(struct sd *sd, double pts);
// converter
struct demux_packet *(*get_converted)(struct sd *sd);
};
void sd_conv_add_packet(struct sd *sd, void *data, int data_len, double pts,
double duration, int64_t pos);
struct demux_packet *sd_conv_def_get_converted(struct sd *sd);
void sd_conv_def_reset(struct sd *sd);
void sd_conv_def_uninit(struct sd *sd);
#define SD_MAX_LINE_LEN 1000
struct lavc_conv;
bool lavc_conv_supports_format(const char *format);
struct lavc_conv *lavc_conv_create(struct mp_log *log, const char *codec_name,
char *extradata, int extradata_len);
char *lavc_conv_get_extradata(struct lavc_conv *priv);
char **lavc_conv_decode(struct lavc_conv *priv, struct demux_packet *packet);
void lavc_conv_reset(struct lavc_conv *priv);
void lavc_conv_uninit(struct lavc_conv *priv);
#endif

45
sub/sd_ass.c
View File

@ -40,6 +40,7 @@ struct sd_ass_priv {
struct ass_track *ass_track;
struct ass_track *shadow_track; // for --sub-ass=no rendering
bool is_converted;
struct lavc_conv *converter;
bool on_top;
struct sub_bitmap *parts;
char last_text[500];
@ -79,21 +80,31 @@ static void mp_ass_add_default_styles(ASS_Track *track, struct MPOpts *opts)
static bool supports_format(const char *format)
{
// "ssa" is used for the FFmpeg subtitle converter output
return format && (strcmp(format, "ass") == 0 ||
strcmp(format, "ssa") == 0);
return (format && strcmp(format, "ass") == 0) ||
lavc_conv_supports_format(format);
}
static int init(struct sd *sd)
{
struct MPOpts *opts = sd->opts;
if (!sd->ass_library || !sd->ass_renderer || !sd->ass_lock || !sd->codec)
if (!sd->ass_library || !sd->ass_renderer || !sd->ass_lock)
return -1;
struct sd_ass_priv *ctx = talloc_zero(NULL, struct sd_ass_priv);
struct sd_ass_priv *ctx = talloc_zero(sd, struct sd_ass_priv);
sd->priv = ctx;
ctx->is_converted = sd->converted_from != NULL;
char *extradata = sd->sh->extradata;
int extradata_size = sd->sh->extradata_size;
if (strcmp(sd->sh->codec, "ass") != 0) {
ctx->is_converted = true;
ctx->converter = lavc_conv_create(sd->log, sd->sh->codec, extradata,
extradata_size);
if (!ctx->converter)
return -1;
extradata = lavc_conv_get_extradata(ctx->converter);
extradata_size = extradata ? strlen(extradata) : 0;
}
pthread_mutex_lock(sd->ass_lock);
@ -106,10 +117,8 @@ static int init(struct sd *sd)
ctx->shadow_track->PlayResY = 288;
mp_ass_add_default_styles(ctx->shadow_track, opts);
if (sd->extradata) {
ass_process_codec_private(ctx->ass_track, sd->extradata,
sd->extradata_len);
}
if (extradata)
ass_process_codec_private(ctx->ass_track, extradata, extradata_size);
mp_ass_add_default_styles(ctx->ass_track, opts);
@ -158,15 +167,18 @@ static void decode(struct sd *sd, struct demux_packet *packet)
{
struct sd_ass_priv *ctx = sd->priv;
ASS_Track *track = ctx->ass_track;
if (strcmp(sd->codec, "ass") == 0) {
if (ctx->converter) {
if (check_packet_seen(sd, packet->pos))
return;
char **r = lavc_conv_decode(ctx->converter, packet);
for (int n = 0; r && r[n]; n++)
ass_process_data(track, r[n], strlen(r[n]));
} else {
// Note that for this packet format, libass has an internal mechanism
// for discarding duplicate (already seen) packets.
ass_process_chunk(track, packet->buffer, packet->len,
lrint(packet->pts * 1000),
lrint(packet->duration * 1000));
} else {
if (!check_packet_seen(sd, packet->pos))
ass_process_data(track, packet->buffer, packet->len);
}
}
@ -505,14 +517,17 @@ static void reset(struct sd *sd)
struct sd_ass_priv *ctx = sd->priv;
if (sd->opts->sub_clear_on_seek)
ass_flush_events(ctx->ass_track);
if (ctx->converter)
lavc_conv_reset(ctx->converter);
}
static void uninit(struct sd *sd)
{
struct sd_ass_priv *ctx = sd->priv;
if (ctx->converter)
lavc_conv_uninit(ctx->converter);
ass_free_track(ctx->ass_track);
talloc_free(ctx);
}
static int control(struct sd *sd, enum sd_ctrl cmd, void *arg)

5
sub/sd_lavc.c
View File

@ -28,6 +28,7 @@
#include "talloc.h"
#include "common/msg.h"
#include "common/av_common.h"
#include "demux/stheader.h"
#include "options/options.h"
#include "video/mp_image.h"
#include "sd.h"
@ -110,7 +111,7 @@ static void get_resolution(struct sd *sd, int wh[2])
static int init(struct sd *sd)
{
struct sd_lavc_priv *priv = talloc_zero(NULL, struct sd_lavc_priv);
enum AVCodecID cid = mp_codec_to_av_codec_id(sd->codec);
enum AVCodecID cid = mp_codec_to_av_codec_id(sd->sh->codec);
AVCodecContext *ctx = NULL;
AVCodec *sub_codec = avcodec_find_decoder(cid);
if (!sub_codec)
@ -118,7 +119,7 @@ static int init(struct sd *sd)
ctx = avcodec_alloc_context3(sub_codec);
if (!ctx)
goto error;
mp_lavc_set_extradata(ctx, sd->extradata, sd->extradata_len);
mp_lavc_set_extradata(ctx, sd->sh->extradata, sd->sh->extradata_size);
if (avcodec_open2(ctx, sub_codec, NULL) < 0)
goto error;
priv->avctx = ctx;

101
sub/sd_lavc_conv.c
View File

@ -32,8 +32,13 @@
#define HAVE_AV_WEBVTT (LIBAVCODEC_VERSION_MICRO >= 100)
struct sd_lavc_priv {
struct lavc_conv {
struct mp_log *log;
AVCodecContext *avctx;
char *codec;
char *extradata;
AVSubtitle cur;
char **cur_list;
};
static const char *get_lavc_format(const char *format)
@ -44,7 +49,7 @@ static const char *get_lavc_format(const char *format)
return format;
}
static bool supports_format(const char *format)
bool lavc_conv_supports_format(const char *format)
{
format = get_lavc_format(format);
enum AVCodecID cid = mp_codec_to_av_codec_id(format);
@ -66,40 +71,43 @@ static void disable_styles(bstr header)
}
}
static int init(struct sd *sd)
struct lavc_conv *lavc_conv_create(struct mp_log *log, const char *codec_name,
char *extradata, int extradata_len)
{
struct sd_lavc_priv *priv = talloc_zero(NULL, struct sd_lavc_priv);
struct lavc_conv *priv = talloc_zero(NULL, struct lavc_conv);
priv->log = log;
priv->cur_list = talloc_array(priv, char*, 0);
priv->codec = talloc_strdup(priv, codec_name);
AVCodecContext *avctx = NULL;
const char *fmt = get_lavc_format(sd->codec);
const char *fmt = get_lavc_format(priv->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;
avctx->extradata_size = extradata_len;
avctx->extradata = talloc_memdup(priv, extradata, extradata_len);
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;
priv->extradata = talloc_strndup(priv, avctx->subtitle_header,
avctx->subtitle_header_size);
disable_styles(bstr0(priv->extradata));
return priv;
error:
MP_FATAL(sd, "Could not open libavcodec subtitle converter\n");
MP_FATAL(priv, "Could not open libavcodec subtitle converter\n");
av_free(avctx);
talloc_free(priv);
return -1;
return NULL;
}
char *lavc_conv_get_extradata(struct lavc_conv *priv)
{
return priv->extradata;
}
#if HAVE_AV_WEBVTT
@ -217,71 +225,56 @@ static int parse_webvtt(AVPacket *in, AVPacket *pkt)
#endif
static void decode(struct sd *sd, struct demux_packet *packet)
// Return a NULL-terminated list of ASS event lines.
char **lavc_conv_decode(struct lavc_conv *priv, 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;
avsubtitle_free(&priv->cur);
priv->cur_list[0] = NULL;
mp_set_av_packet(&pkt, packet, &avctx->time_base);
if (sd->codec && strcmp(sd->codec, "webvtt-webm") == 0) {
if (strcmp(priv->codec, "webvtt-webm") == 0) {
if (parse_webvtt(&pkt, &parsed_pkt) < 0) {
MP_ERR(sd, "Error parsing subtitle\n");
MP_ERR(priv, "Error parsing subtitle\n");
goto done;
}
pkt = parsed_pkt;
}
ret = avcodec_decode_subtitle2(avctx, &sub, &got_sub, &pkt);
ret = avcodec_decode_subtitle2(avctx, &priv->cur, &got_sub, &pkt);
if (ret < 0) {
MP_ERR(sd, "Error decoding subtitle\n");
MP_ERR(priv, "Error decoding subtitle\n");
} else if (got_sub) {
for (int i = 0; i < sub.num_rects; i++) {
if (sub.rects[i]->w > 0 && sub.rects[i]->h > 0)
MP_WARN(sd, "Ignoring bitmap subtitle.\n");
char *ass_line = sub.rects[i]->ass;
int num_cur = 0;
for (int i = 0; i < priv->cur.num_rects; i++) {
if (priv->cur.rects[i]->w > 0 && priv->cur.rects[i]->h > 0)
MP_WARN(priv, "Ignoring bitmap subtitle.\n");
char *ass_line = priv->cur.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, packet->pos + i);
continue;
MP_TARRAY_APPEND(priv, priv->cur_list, num_cur, ass_line);
}
MP_TARRAY_APPEND(priv, priv->cur_list, num_cur, NULL);
}
done:
avsubtitle_free(&sub);
av_packet_unref(&parsed_pkt);
return priv->cur_list;
}
static void reset(struct sd *sd)
void lavc_conv_reset(struct lavc_conv *priv)
{
struct sd_lavc_priv *priv = sd->priv;
avcodec_flush_buffers(priv->avctx);
sd_conv_def_reset(sd);
}
static void uninit(struct sd *sd)
void lavc_conv_uninit(struct lavc_conv *priv)
{
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,
};