RepoMirrors
/
mpv
mirror of https://github.com/mpv-player/mpv
1
0
Fork 0
Code Issues Releases Wiki Activity
mpv/demux/demux.c

1111 lines
33 KiB
C
Raw Blame History

/*
* DEMUXER v2.5
*
* 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.
*/
#define DEMUX_PRIV(x) x
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "config.h"
#include "mpvcore/options.h"
#include "mpvcore/av_common.h"
#include "talloc.h"
#include "mpvcore/mp_msg.h"
#include "stream/stream.h"
#include "demux.h"
#include "stheader.h"
#include "mf.h"
#include "audio/format.h"
#include <libavcodec/avcodec.h>
#if MP_INPUT_BUFFER_PADDING_SIZE < FF_INPUT_BUFFER_PADDING_SIZE
#error MP_INPUT_BUFFER_PADDING_SIZE is too small!
#endif
// Demuxer list
extern const struct demuxer_desc demuxer_desc_edl;
extern const struct demuxer_desc demuxer_desc_cue;
extern const demuxer_desc_t demuxer_desc_rawaudio;
extern const demuxer_desc_t demuxer_desc_rawvideo;
extern const demuxer_desc_t demuxer_desc_tv;
extern const demuxer_desc_t demuxer_desc_mf;
extern const demuxer_desc_t demuxer_desc_matroska;
extern const demuxer_desc_t demuxer_desc_lavf;
extern const demuxer_desc_t demuxer_desc_libass;
extern const demuxer_desc_t demuxer_desc_subreader;
extern const demuxer_desc_t demuxer_desc_playlist;
/* Please do not add any new demuxers here. If you want to implement a new
* demuxer, add it to libavformat, except for wrappers around external
* libraries and demuxers requiring binary support. */
const demuxer_desc_t *const demuxer_list[] = {
&demuxer_desc_edl,
&demuxer_desc_cue,
&demuxer_desc_rawaudio,
&demuxer_desc_rawvideo,
#if HAVE_TV
&demuxer_desc_tv,
#endif
#if HAVE_LIBASS
&demuxer_desc_libass,
#endif
&demuxer_desc_matroska,
&demuxer_desc_lavf,
&demuxer_desc_mf,
&demuxer_desc_playlist,
// Pretty aggressive, so should be last.
&demuxer_desc_subreader,
/* Please do not add any new demuxers here. If you want to implement a new
* demuxer, add it to libavformat, except for wrappers around external
* libraries and demuxers requiring binary support. */
NULL
};
struct demux_stream {
int selected; // user wants packets from this stream
int eof; // end of demuxed stream? (true if all buffer empty)
int packs; // number of packets in buffer
int bytes; // total bytes of packets in buffer
struct demux_packet *head;
struct demux_packet *tail;
};
static void add_stream_chapters(struct demuxer *demuxer);
static void ds_free_packs(struct demux_stream *ds)
{
demux_packet_t *dp = ds->head;
while (dp) {
demux_packet_t *dn = dp->next;
free_demux_packet(dp);
dp = dn;
}
ds->head = ds->tail = NULL;
ds->packs = 0; // !!!!!
ds->bytes = 0;
ds->eof = 0;
}
static void packet_destroy(void *ptr)
{
struct demux_packet *dp = ptr;
talloc_free(dp->avpacket);
free(dp->allocation);
}
static struct demux_packet *create_packet(size_t len)
{
if (len > 1000000000) {
mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Attempt to allocate demux packet "
"over 1 GB!\n");
abort();
}
struct demux_packet *dp = talloc(NULL, struct demux_packet);
talloc_set_destructor(dp, packet_destroy);
*dp = (struct demux_packet) {
.len = len,
.pts = MP_NOPTS_VALUE,
.dts = MP_NOPTS_VALUE,
.duration = -1,
.stream_pts = MP_NOPTS_VALUE,
.pos = -1,
.stream = -1,
};
return dp;
}
struct demux_packet *new_demux_packet(size_t len)
{
struct demux_packet *dp = create_packet(len);
dp->buffer = malloc(len + MP_INPUT_BUFFER_PADDING_SIZE);
if (!dp->buffer) {
mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Memory allocation failure!\n");
abort();
}
memset(dp->buffer + len, 0, MP_INPUT_BUFFER_PADDING_SIZE);
dp->allocation = dp->buffer;
return dp;
}
// data must already have suitable padding, and does not copy the data
struct demux_packet *new_demux_packet_fromdata(void *data, size_t len)
{
struct demux_packet *dp = create_packet(len);
dp->buffer = data;
return dp;
}
struct demux_packet *new_demux_packet_from(void *data, size_t len)
{
struct demux_packet *dp = new_demux_packet(len);
memcpy(dp->buffer, data, len);
return dp;
}
void resize_demux_packet(struct demux_packet *dp, size_t len)
{
if (len > 1000000000) {
mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Attempt to realloc demux packet "
"over 1 GB!\n");
abort();
}
assert(dp->allocation);
dp->buffer = realloc(dp->buffer, len + MP_INPUT_BUFFER_PADDING_SIZE);
if (!dp->buffer) {
mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Memory allocation failure!\n");
abort();
}
memset(dp->buffer + len, 0, MP_INPUT_BUFFER_PADDING_SIZE);
dp->len = len;
dp->allocation = dp->buffer;
}
void free_demux_packet(struct demux_packet *dp)
{
talloc_free(dp);
}
static void destroy_avpacket(void *pkt)
{
av_free_packet(pkt);
}
struct demux_packet *demux_copy_packet(struct demux_packet *dp)
{
struct demux_packet *new = NULL;
// No av_copy_packet() in Libav
#if LIBAVCODEC_VERSION_MICRO >= 100
if (dp->avpacket) {
assert(dp->buffer == dp->avpacket->data);
assert(dp->len == dp->avpacket->size);
AVPacket *newavp = talloc_zero(NULL, AVPacket);
talloc_set_destructor(newavp, destroy_avpacket);
av_init_packet(newavp);
if (av_copy_packet(newavp, dp->avpacket) < 0)
abort();
new = new_demux_packet_fromdata(newavp->data, newavp->size);
new->avpacket = newavp;
}
#endif
if (!new) {
new = new_demux_packet(dp->len);
memcpy(new->buffer, dp->buffer, new->len);
}
new->pts = dp->pts;
new->dts = dp->dts;
new->duration = dp->duration;
new->stream_pts = dp->stream_pts;
return new;
}
struct sh_stream *new_sh_stream(demuxer_t *demuxer, enum stream_type type)
{
if (demuxer->num_streams > MAX_SH_STREAMS) {
mp_msg(MSGT_DEMUXER, MSGL_WARN, "Too many streams.");
return NULL;
}
int demuxer_id = 0;
for (int n = 0; n < demuxer->num_streams; n++) {
if (demuxer->streams[n]->type == type)
demuxer_id++;
}
struct sh_stream *sh = talloc_ptrtype(demuxer, sh);
*sh = (struct sh_stream) {
.type = type,
.demuxer = demuxer,
.index = demuxer->num_streams,
.demuxer_id = demuxer_id, // may be overwritten by demuxer
.ds = talloc_zero(sh, struct demux_stream),
};
MP_TARRAY_APPEND(demuxer, demuxer->streams, demuxer->num_streams, sh);
switch (sh->type) {
case STREAM_VIDEO: {
struct sh_video *sht = talloc_zero(demuxer, struct sh_video);
sh->video = sht;
break;
}
case STREAM_AUDIO: {
struct sh_audio *sht = talloc_zero(demuxer, struct sh_audio);
sh->audio = sht;
break;
}
case STREAM_SUB: {
struct sh_sub *sht = talloc_zero(demuxer, struct sh_sub);
sh->sub = sht;
break;
}
default: assert(false);
}
sh->ds->selected = demuxer->stream_autoselect;
return sh;
}
void free_demuxer(demuxer_t *demuxer)
{
if (!demuxer)
return;
if (demuxer->desc->close)
demuxer->desc->close(demuxer);
// free streams:
for (int n = 0; n < demuxer->num_streams; n++)
ds_free_packs(demuxer->streams[n]->ds);
talloc_free(demuxer);
}
static const char *stream_type_name(enum stream_type type)
{
switch (type) {
case STREAM_VIDEO: return "video";
case STREAM_AUDIO: return "audio";
case STREAM_SUB: return "sub";
default: return "unknown";
}
}
static int count_packs(struct demuxer *demux, enum stream_type type)
{
int c = 0;
for (int n = 0; n < demux->num_streams; n++)
c += demux->streams[n]->type == type ? demux->streams[n]->ds->packs : 0;
return c;
}
static int count_bytes(struct demuxer *demux, enum stream_type type)
{
int c = 0;
for (int n = 0; n < demux->num_streams; n++)
c += demux->streams[n]->type == type ? demux->streams[n]->ds->bytes : 0;
return c;
}
// Returns the same value as demuxer->fill_buffer: 1 ok, 0 EOF/not selected.
int demuxer_add_packet(demuxer_t *demuxer, struct sh_stream *stream,
demux_packet_t *dp)
{
struct demux_stream *ds = stream ? stream->ds : NULL;
if (!dp || !ds || !ds->selected) {
talloc_free(dp);
return 0;
}
if (stream->type == STREAM_VIDEO && !dp->len) {
/* Video packets with size 0 are assumed to not correspond to frames,
* but to indicate the absence of a frame in formats like AVI
* that must have packets at fixed timestamp intervals. */
talloc_free(dp);
return 1;
}
dp->stream = stream->index;
dp->next = NULL;
ds->packs++;
ds->bytes += dp->len;
if (ds->tail) {
// next packet in stream
ds->tail->next = dp;
ds->tail = dp;
} else {
// first packet in stream
ds->head = ds->tail = dp;
}
/* ds_get_packets() can set ds->eof to 1 when another stream runs out of
* buffer space. That makes sense because in that situation the calling
* code should not count on being able to demux more packets from this
* stream. (Can happen with e.g. badly interleaved files.)
* In this case, we didn't necessarily reach EOF, and new packet can
* appear. */
ds->eof = 0;
if (dp->pos >= 0)
demuxer->filepos = dp->pos;
// For video, PTS determination is not trivial, but for other media types
// distinguishing PTS and DTS is not useful.
if (stream->type != STREAM_VIDEO && dp->pts == MP_NOPTS_VALUE)
dp->pts = dp->dts;
mp_msg(MSGT_DEMUXER, MSGL_DBG2,
"DEMUX: Append packet to %s, len=%d pts=%5.3f pos=%"PRIu64" "
"[packs: A=%d V=%d S=%d]\n", stream_type_name(stream->type),
dp->len, dp->pts, dp->pos, count_packs(demuxer, STREAM_AUDIO),
count_packs(demuxer, STREAM_VIDEO), count_packs(demuxer, STREAM_SUB));
return 1;
}
static bool demux_check_queue_full(demuxer_t *demux)
{
for (int n = 0; n < demux->num_streams; n++) {
struct sh_stream *sh = demux->streams[n];
if (sh->ds->packs > MAX_PACKS || sh->ds->bytes > MAX_PACK_BYTES)
goto overflow;
}
return false;
overflow:
if (!demux->warned_queue_overflow) {
mp_msg(MSGT_DEMUXER, MSGL_ERR, "\nToo many packets in the demuxer "
"packet queue (video: %d packets in %d bytes, audio: %d "
"packets in %d bytes, sub: %d packets in %d bytes).\n",
count_packs(demux, STREAM_VIDEO), count_bytes(demux, STREAM_VIDEO),
count_packs(demux, STREAM_AUDIO), count_bytes(demux, STREAM_AUDIO),
count_packs(demux, STREAM_SUB), count_bytes(demux, STREAM_SUB));
mp_msg(MSGT_DEMUXER, MSGL_HINT, "Maybe you are playing a non-"
"interleaved stream/file or the codec failed?\n");
}
demux->warned_queue_overflow = true;
return true;
}
// return value:
// 0 = EOF or no stream found or invalid type
// 1 = successfully read a packet
static int demux_fill_buffer(demuxer_t *demux)
{
return demux->desc->fill_buffer ? demux->desc->fill_buffer(demux) : 0;
}
static void ds_get_packets(struct sh_stream *sh)
{
struct demux_stream *ds = sh->ds;
demuxer_t *demux = sh->demuxer;
mp_msg(MSGT_DEMUXER, MSGL_DBG3, "ds_get_packets (%s) called\n",
stream_type_name(sh->type));
while (1) {
if (ds->head)
return;
if (demux_check_queue_full(demux))
break;
if (!demux_fill_buffer(demux))
break; // EOF
}
mp_msg(MSGT_DEMUXER, MSGL_V, "ds_get_packets: EOF reached (stream: %s)\n",
stream_type_name(sh->type));
ds->eof = 1;
}
// Read a packet from the given stream. The returned packet belongs to the
// caller, who has to free it with talloc_free(). Might block. Returns NULL
// on EOF.
struct demux_packet *demux_read_packet(struct sh_stream *sh)
{
struct demux_stream *ds = sh ? sh->ds : NULL;
if (ds) {
ds_get_packets(sh);
struct demux_packet *pkt = ds->head;
if (pkt) {
ds->head = pkt->next;
pkt->next = NULL;
if (!ds->head)
ds->tail = NULL;
ds->bytes -= pkt->len;
ds->packs--;
if (pkt->stream_pts != MP_NOPTS_VALUE)
sh->demuxer->stream_pts = pkt->stream_pts;
return pkt;
}
}
return NULL;
}
// Return the pts of the next packet that demux_read_packet() would return.
// Might block. Sometimes used to force a packet read, without removing any
// packets from the queue.
double demux_get_next_pts(struct sh_stream *sh)
{
if (sh && sh->ds->selected) {
ds_get_packets(sh);
if (sh->ds->head)
return sh->ds->head->pts;
}
return MP_NOPTS_VALUE;
}
// Return whether a packet is queued. Never blocks, never forces any reads.
bool demux_has_packet(struct sh_stream *sh)
{
return sh && sh->ds->head;
}
// Same as demux_has_packet, but to be called internally by demuxers, as
// opposed to the user of the demuxer.
bool demuxer_stream_has_packets_queued(struct demuxer *d, struct sh_stream *stream)
{
return demux_has_packet(stream);
}
// Return whether EOF was returned with an earlier packet read.
bool demux_stream_eof(struct sh_stream *sh)
{
return !sh || sh->ds->eof;
}
// ====================================================================
void demuxer_help(void)
{
int i;
mp_msg(MSGT_DEMUXER, MSGL_INFO, "Available demuxers:\n");
mp_msg(MSGT_DEMUXER, MSGL_INFO, " demuxer: info:\n");
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_DEMUXERS\n");
for (i = 0; demuxer_list[i]; i++) {
mp_msg(MSGT_DEMUXER, MSGL_INFO, "%10s %s\n",
demuxer_list[i]->name, demuxer_list[i]->desc);
}
}
static const char *d_level(enum demux_check level)
{
switch (level) {
case DEMUX_CHECK_FORCE: return "force";
case DEMUX_CHECK_UNSAFE: return "unsafe";
case DEMUX_CHECK_REQUEST:return "request";
case DEMUX_CHECK_NORMAL: return "normal";
}
abort();
}
static struct demuxer *open_given_type(struct MPOpts *opts,
const struct demuxer_desc *desc,
struct stream *stream,
struct demuxer_params *params,
enum demux_check check)
{
struct demuxer *demuxer = talloc_ptrtype(NULL, demuxer);
*demuxer = (struct demuxer) {
.desc = desc,
.type = desc->type,
.stream = stream,
.stream_pts = MP_NOPTS_VALUE,
.seekable = (stream->flags & MP_STREAM_SEEK) == MP_STREAM_SEEK &&
stream->end_pos > 0,
.accurate_seek = true,
.filepos = -1,
.opts = opts,
.filename = talloc_strdup(demuxer, stream->url),
.metadata = talloc_zero(demuxer, struct mp_tags),
};
demuxer->params = params; // temporary during open()
stream_seek(stream, stream->start_pos);
mp_msg(MSGT_DEMUXER, MSGL_V, "Trying demuxer: %s (force-level: %s)\n",
desc->name, d_level(check));
int ret = demuxer->desc->open(demuxer, check);
if (ret >= 0) {
demuxer->params = NULL;
if (demuxer->filetype)
mp_msg(MSGT_DEMUXER, MSGL_INFO, "Detected file format: %s (%s)\n",
demuxer->filetype, desc->desc);
else
mp_msg(MSGT_DEMUXER, MSGL_INFO, "Detected file format: %s\n",
desc->desc);
if (stream_manages_timeline(demuxer->stream)) {
// Incorrect, but fixes some behavior with DVD/BD
demuxer->ts_resets_possible = false;
// Doesn't work, because stream_pts is a "guess".
demuxer->accurate_seek = false;
// Can be seekable even if the stream isn't.
demuxer->seekable = true;
}
add_stream_chapters(demuxer);
demuxer_sort_chapters(demuxer);
demux_info_update(demuxer);
// Pretend we can seek if we can't seek, but there's a cache.
if (!demuxer->seekable && stream->uncached_stream) {
mp_msg(MSGT_DEMUXER, MSGL_WARN,
"File is not seekable, but there's a cache: enabling seeking.\n");
demuxer->seekable = true;
}
return demuxer;
}
free_demuxer(demuxer);
return NULL;
}
static const int d_normal[] = {DEMUX_CHECK_NORMAL, DEMUX_CHECK_UNSAFE, -1};
static const int d_request[] = {DEMUX_CHECK_REQUEST, -1};
static const int d_force[] = {DEMUX_CHECK_FORCE, -1};
struct demuxer *demux_open(struct stream *stream, char *force_format,
struct demuxer_params *params, struct MPOpts *opts)
{
const int *check_levels = d_normal;
const struct demuxer_desc *check_desc = NULL;
if (!force_format)
force_format = stream->demuxer;
if (force_format && force_format[0]) {
check_levels = d_request;
if (force_format[0] == '+') {
force_format += 1;
check_levels = d_force;
}
for (int n = 0; demuxer_list[n]; n++) {
if (strcmp(demuxer_list[n]->name, force_format) == 0)
check_desc = demuxer_list[n];
}
if (!check_desc) {
mp_msg(MSGT_DEMUXER, MSGL_ERR, "Demuxer %s does not exist.\n",
force_format);
return NULL;
}
}
// Peek this much data to avoid that stream_read() run by some demuxers
// or stream filters will flush previous peeked data.
stream_peek(stream, STREAM_BUFFER_SIZE);
// Test demuxers from first to last, one pass for each check_levels[] entry
for (int pass = 0; check_levels[pass] != -1; pass++) {
enum demux_check level = check_levels[pass];
for (int n = 0; demuxer_list[n]; n++) {
const struct demuxer_desc *desc = demuxer_list[n];
if (!check_desc || desc == check_desc) {
struct demuxer *demuxer = open_given_type(opts, desc, stream,
params, level);
if (demuxer)
return demuxer;
}
}
}
return NULL;
}
void demux_flush(demuxer_t *demuxer)
{
for (int n = 0; n < demuxer->num_streams; n++)
ds_free_packs(demuxer->streams[n]->ds);
demuxer->warned_queue_overflow = false;
}
int demux_seek(demuxer_t *demuxer, float rel_seek_secs, int flags)
{
if (!demuxer->seekable) {
mp_msg(MSGT_DEMUXER, MSGL_WARN, "Cannot seek in this file.\n");
return 0;
}
if (rel_seek_secs == MP_NOPTS_VALUE && (flags & SEEK_ABSOLUTE))
return 0;
// clear demux buffers:
demux_flush(demuxer);
/* Note: this is for DVD and BD playback. The stream layer has to do these
* seeks, and the demuxer has to react to DEMUXER_CTRL_RESYNC in order to
* deal with the suddenly changing stream position.
*/
struct stream *stream = demuxer->stream;
if (stream_manages_timeline(stream)) {
double pts;
if (flags & SEEK_ABSOLUTE)
pts = 0.0f;
else {
if (demuxer->stream_pts == MP_NOPTS_VALUE)
goto dmx_seek;
pts = demuxer->stream_pts;
}
if (flags & SEEK_FACTOR) {
double tmp = 0;
if (stream_control(demuxer->stream, STREAM_CTRL_GET_TIME_LENGTH,
&tmp) == STREAM_UNSUPPORTED)
goto dmx_seek;
pts += tmp * rel_seek_secs;
} else
pts += rel_seek_secs;
if (stream_control(demuxer->stream, STREAM_CTRL_SEEK_TO_TIME, &pts)
!= STREAM_UNSUPPORTED) {
demux_control(demuxer, DEMUXER_CTRL_RESYNC, NULL);
return 1;
}
}
dmx_seek:
if (demuxer->desc->seek)
demuxer->desc->seek(demuxer, rel_seek_secs, flags);
return 1;
}
void mp_tags_set_str(struct mp_tags *tags, const char *key, const char *value)
{
mp_tags_set_bstr(tags, bstr0(key), bstr0(value));
}
void mp_tags_set_bstr(struct mp_tags *tags, bstr key, bstr value)
{
for (int n = 0; n < tags->num_keys; n++) {
if (bstrcasecmp0(key, tags->keys[n]) == 0) {
talloc_free(tags->values[n]);
tags->values[n] = talloc_strndup(tags, value.start, value.len);
return;
}
}
MP_RESIZE_ARRAY(tags, tags->keys, tags->num_keys + 1);
MP_RESIZE_ARRAY(tags, tags->values, tags->num_keys + 1);
tags->keys[tags->num_keys] = talloc_strndup(tags, key.start, key.len);
tags->values[tags->num_keys] = talloc_strndup(tags, value.start, value.len);
tags->num_keys++;
}
char *mp_tags_get_str(struct mp_tags *tags, const char *key)
{
return mp_tags_get_bstr(tags, bstr0(key));
}
char *mp_tags_get_bstr(struct mp_tags *tags, bstr key)
{
for (int n = 0; n < tags->num_keys; n++) {
if (bstrcasecmp0(key, tags->keys[n]) == 0)
return tags->values[n];
}
return NULL;
}
int demux_info_add(demuxer_t *demuxer, const char *opt, const char *param)
{
return demux_info_add_bstr(demuxer, bstr0(opt), bstr0(param));
}
int demux_info_add_bstr(demuxer_t *demuxer, struct bstr opt, struct bstr param)
{
char *oldval = mp_tags_get_bstr(demuxer->metadata, opt);
if (oldval) {
if (bstrcmp0(param, oldval) == 0)
return 0;
mp_msg(MSGT_DEMUX, MSGL_INFO, "Demuxer info %.*s changed to %.*s\n",
BSTR_P(opt), BSTR_P(param));
}
mp_tags_set_bstr(demuxer->metadata, opt, param);
return 1;
}
int demux_info_print(demuxer_t *demuxer)
{
struct mp_tags *info = demuxer->metadata;
int n;
if (!info || !info->num_keys)
return 0;
mp_msg(MSGT_DEMUX, MSGL_INFO, "Clip info:\n");
for (n = 0; n < info->num_keys; n++) {
mp_msg(MSGT_DEMUX, MSGL_INFO, " %s: %s\n", info->keys[n],
info->values[n]);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CLIP_INFO_NAME%d=%s\n", n,
info->keys[n]);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CLIP_INFO_VALUE%d=%s\n", n,
info->values[n]);
}
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CLIP_INFO_N=%d\n", n);
return 0;
}
char *demux_info_get(demuxer_t *demuxer, const char *opt)
{
return mp_tags_get_str(demuxer->metadata, opt);
}
void demux_info_update(struct demuxer *demuxer)
{
demux_control(demuxer, DEMUXER_CTRL_UPDATE_INFO, NULL);
// Take care of stream metadata as well
char **meta;
if (stream_control(demuxer->stream, STREAM_CTRL_GET_METADATA, &meta) > 0) {
for (int n = 0; meta[n + 0]; n += 2)
demux_info_add(demuxer, meta[n + 0], meta[n + 1]);
talloc_free(meta);
}
}
int demux_control(demuxer_t *demuxer, int cmd, void *arg)
{
if (demuxer->desc->control)
return demuxer->desc->control(demuxer, cmd, arg);
return DEMUXER_CTRL_NOTIMPL;
}
struct sh_stream *demuxer_stream_by_demuxer_id(struct demuxer *d,
enum stream_type t, int id)
{
for (int n = 0; n < d->num_streams; n++) {
struct sh_stream *s = d->streams[n];
if (s->type == t && s->demuxer_id == id)
return d->streams[n];
}
return NULL;
}
void demuxer_switch_track(struct demuxer *demuxer, enum stream_type type,
struct sh_stream *stream)
{
assert(!stream || stream->type == type);
for (int n = 0; n < demuxer->num_streams; n++) {
struct sh_stream *cur = demuxer->streams[n];
if (cur->type == type)
demuxer_select_track(demuxer, cur, cur == stream);
}
}
void demuxer_select_track(struct demuxer *demuxer, struct sh_stream *stream,
bool selected)
{
// don't flush buffers if stream is already selected / unselected
if (stream->ds->selected != selected) {
stream->ds->selected = selected;
ds_free_packs(stream->ds);
demux_control(demuxer, DEMUXER_CTRL_SWITCHED_TRACKS, NULL);
}
}
void demuxer_enable_autoselect(struct demuxer *demuxer)
{
demuxer->stream_autoselect = true;
}
bool demuxer_stream_is_selected(struct demuxer *d, struct sh_stream *stream)
{
return stream && stream->ds->selected;
}
int demuxer_add_attachment(demuxer_t *demuxer, struct bstr name,
struct bstr type, struct bstr data)
{
if (!(demuxer->num_attachments % 32))
demuxer->attachments = talloc_realloc(demuxer, demuxer->attachments,
struct demux_attachment,
demuxer->num_attachments + 32);
struct demux_attachment *att =
demuxer->attachments + demuxer->num_attachments;
att->name = talloc_strndup(demuxer->attachments, name.start, name.len);
att->type = talloc_strndup(demuxer->attachments, type.start, type.len);
att->data = talloc_size(demuxer->attachments, data.len);
memcpy(att->data, data.start, data.len);
att->data_size = data.len;
return demuxer->num_attachments++;
}
static int chapter_compare(const void *p1, const void *p2)
{
struct demux_chapter *c1 = (void *)p1;
struct demux_chapter *c2 = (void *)p2;
if (c1->start > c2->start)
return 1;
else if (c1->start < c2->start)
return -1;
return c1->original_index > c2->original_index ? 1 :-1; // never equal
}
void demuxer_sort_chapters(demuxer_t *demuxer)
{
qsort(demuxer->chapters, demuxer->num_chapters,
sizeof(struct demux_chapter), chapter_compare);
}
int demuxer_add_chapter(demuxer_t *demuxer, struct bstr name,
uint64_t start, uint64_t end, uint64_t demuxer_id)
{
struct demux_chapter new = {
.original_index = demuxer->num_chapters,
.start = start,
.end = end,
.name = name.len ? bstrdup0(demuxer, name) : NULL,
.metadata = talloc_zero(demuxer, struct mp_tags),
.demuxer_id = demuxer_id,
};
mp_tags_set_bstr(new.metadata, bstr0("TITLE"), name);
MP_TARRAY_APPEND(demuxer, demuxer->chapters, demuxer->num_chapters, new);
return 0;
}
void demuxer_add_chapter_info(struct demuxer *demuxer, uint64_t demuxer_id,
bstr key, bstr value)
{
for (int n = 0; n < demuxer->num_chapters; n++) {
struct demux_chapter *ch = &demuxer->chapters[n];
if (ch->demuxer_id == demuxer_id) {
mp_tags_set_bstr(ch->metadata, key, value);
return;
}
}
}
static void add_stream_chapters(struct demuxer *demuxer)
{
if (demuxer->num_chapters)
return;
int num_chapters = demuxer_chapter_count(demuxer);
for (int n = 0; n < num_chapters; n++) {
double p = n;
if (stream_control(demuxer->stream, STREAM_CTRL_GET_CHAPTER_TIME, &p)
!= STREAM_OK)
return;
demuxer_add_chapter(demuxer, bstr0(""), p * 1e9, 0, 0);
}
}
/**
* \brief demuxer_seek_chapter() seeks to a chapter in two possible ways:
* either using the demuxer->chapters structure set by the demuxer
* or asking help to the stream layer (e.g. dvd)
* \param chapter - chapter number wished - 0-based
* \param seek_pts set by the function to the pts to seek to (if demuxer->chapters is set)
* \return -1 on error, current chapter if successful
*/
int demuxer_seek_chapter(demuxer_t *demuxer, int chapter, double *seek_pts)
{
int ris = STREAM_UNSUPPORTED;
if (demuxer->num_chapters == 0)
ris = stream_control(demuxer->stream, STREAM_CTRL_SEEK_TO_CHAPTER,
&chapter);
if (ris != STREAM_UNSUPPORTED) {
demux_flush(demuxer);
demux_control(demuxer, DEMUXER_CTRL_RESYNC, NULL);
// exit status may be ok, but main() doesn't have to seek itself
// (because e.g. dvds depend on sectors, not on pts)
*seek_pts = -1.0;
return chapter;
} else {
if (chapter >= demuxer->num_chapters)
return -1;
if (chapter < 0)
chapter = 0;
*seek_pts = demuxer->chapters[chapter].start / 1e9;
return chapter;
}
}
int demuxer_get_current_chapter(demuxer_t *demuxer, double time_now)
{
int chapter = -2;
if (!demuxer->num_chapters || !demuxer->chapters) {
if (stream_control(demuxer->stream, STREAM_CTRL_GET_CURRENT_CHAPTER,
&chapter) == STREAM_UNSUPPORTED)
chapter = -2;
} else {
uint64_t now = time_now * 1e9 + 0.5;
for (chapter = demuxer->num_chapters - 1; chapter >= 0; --chapter) {
if (demuxer->chapters[chapter].start <= now)
break;
}
}
return chapter;
}
char *demuxer_chapter_name(demuxer_t *demuxer, int chapter)
{
if (demuxer->num_chapters && demuxer->chapters) {
if (chapter >= 0 && chapter < demuxer->num_chapters
&& demuxer->chapters[chapter].name)
return talloc_strdup(NULL, demuxer->chapters[chapter].name);
}
return NULL;
}
double demuxer_chapter_time(demuxer_t *demuxer, int chapter)
{
if (demuxer->num_chapters && demuxer->chapters && chapter >= 0
&& chapter < demuxer->num_chapters) {
return demuxer->chapters[chapter].start / 1e9;
}
return -1.0;
}
int demuxer_chapter_count(demuxer_t *demuxer)
{
if (!demuxer->num_chapters || !demuxer->chapters) {
int num_chapters = 0;
if (stream_control(demuxer->stream, STREAM_CTRL_GET_NUM_CHAPTERS,
&num_chapters) == STREAM_UNSUPPORTED)
num_chapters = 0;
return num_chapters;
} else
return demuxer->num_chapters;
}
double demuxer_get_time_length(struct demuxer *demuxer)
{
double len;
if (stream_control(demuxer->stream, STREAM_CTRL_GET_TIME_LENGTH, &len) > 0)
return len;
// <= 0 means DEMUXER_CTRL_NOTIMPL or DEMUXER_CTRL_DONTKNOW
if (demux_control(demuxer, DEMUXER_CTRL_GET_TIME_LENGTH, &len) > 0)
return len;
return -1;
}
double demuxer_get_start_time(struct demuxer *demuxer)
{
double time;
if (stream_control(demuxer->stream, STREAM_CTRL_GET_START_TIME, &time) > 0)
return time;
if (demux_control(demuxer, DEMUXER_CTRL_GET_START_TIME, &time) > 0)
return time;
return 0;
}
int demuxer_angles_count(demuxer_t *demuxer)
{
int ris, angles = -1;
ris = stream_control(demuxer->stream, STREAM_CTRL_GET_NUM_ANGLES, &angles);
if (ris == STREAM_UNSUPPORTED)
return -1;
return angles;
}
int demuxer_get_current_angle(demuxer_t *demuxer)
{
int ris, curr_angle = -1;
ris = stream_control(demuxer->stream, STREAM_CTRL_GET_ANGLE, &curr_angle);
if (ris == STREAM_UNSUPPORTED)
return -1;
return curr_angle;
}
int demuxer_set_angle(demuxer_t *demuxer, int angle)
{
int ris, angles = -1;
angles = demuxer_angles_count(demuxer);
if ((angles < 1) || (angle > angles))
return -1;
demux_flush(demuxer);
ris = stream_control(demuxer->stream, STREAM_CTRL_SET_ANGLE, &angle);
if (ris == STREAM_UNSUPPORTED)
return -1;
demux_control(demuxer, DEMUXER_CTRL_RESYNC, NULL);
return angle;
}
static int packet_sort_compare(const void *p1, const void *p2)
{
struct demux_packet *c1 = *(struct demux_packet **)p1;
struct demux_packet *c2 = *(struct demux_packet **)p2;
if (c1->pts > c2->pts)
return 1;
else if (c1->pts < c2->pts)
return -1;
return 0;
}
void demux_packet_list_sort(struct demux_packet **pkts, int num_pkts)
{
qsort(pkts, num_pkts, sizeof(struct demux_packet *), packet_sort_compare);
}
void demux_packet_list_seek(struct demux_packet **pkts, int num_pkts,
int *current, float rel_seek_secs, int flags)
{
double ref_time = 0;
if (*current >= 0 && *current < num_pkts) {
ref_time = pkts[*current]->pts;
} else if (*current == num_pkts && num_pkts > 0) {
ref_time = pkts[num_pkts - 1]->pts + pkts[num_pkts - 1]->duration;
}
if (flags & SEEK_ABSOLUTE)
ref_time = 0;
if (flags & SEEK_FACTOR) {
ref_time += demux_packet_list_duration(pkts, num_pkts) * rel_seek_secs;
} else {
ref_time += rel_seek_secs;
}
// Could do binary search, but it's probably not worth the complexity.
int last_index = 0;
for (int n = 0; n < num_pkts; n++) {
if (pkts[n]->pts > ref_time)
break;
last_index = n;
}
*current = last_index;
}
double demux_packet_list_duration(struct demux_packet **pkts, int num_pkts)
{
if (num_pkts > 0)
return pkts[num_pkts - 1]->pts + pkts[num_pkts - 1]->duration;
return 0;
}
struct demux_packet *demux_packet_list_fill(struct demux_packet **pkts,
int num_pkts, int *current)
{
if (*current < 0)
*current = 0;
if (*current >= num_pkts)
return NULL;
struct demux_packet *new = talloc(NULL, struct demux_packet);
*new = *pkts[*current];
*current += 1;
return new;
}
Reference in New Issue View Git Blame Copy Permalink