static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
{
int i, ret;
AVDictionary *options = NULL;
AVDictionaryEntry *entry;
char *filename;
char *format = NULL, *select = NULL;
AVFormatContext *avf2 = NULL;
AVStream *st, *st2;
int stream_count;
if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
return ret;
#define STEAL_OPTION(option, field) do { \
if ((entry = av_dict_get(options, option, NULL, 0))) { \
field = entry->value; \
entry->value = NULL; /* prevent it from being freed */ \
av_dict_set(&options, option, NULL, 0); \
} \
} while (0)
STEAL_OPTION("f", format);
STEAL_OPTION("select", select);
ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
if (ret < 0)
goto end;
av_dict_copy(&avf2->metadata, avf->metadata, 0);
tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
if (!tee_slave->stream_map) {
ret = AVERROR(ENOMEM);
goto end;
}
stream_count = 0;
for (i = 0; i < avf->nb_streams; i++) {
st = avf->streams[i];
if (select) {
ret = avformat_match_stream_specifier(avf, avf->streams[i], select);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Invalid stream specifier '%s' for output '%s'\n",
select, slave);
goto end;
}
if (ret == 0) { /* no match */
tee_slave->stream_map[i] = -1;
continue;
}
}
tee_slave->stream_map[i] = stream_count++;
if (!(st2 = avformat_new_stream(avf2, NULL))) {
ret = AVERROR(ENOMEM);
goto end;
}
st2->id = st->id;
st2->r_frame_rate = st->r_frame_rate;
st2->time_base = st->time_base;
st2->start_time = st->start_time;
st2->duration = st->duration;
st2->nb_frames = st->nb_frames;
st2->disposition = st->disposition;
st2->sample_aspect_ratio = st->sample_aspect_ratio;
st2->avg_frame_rate = st->avg_frame_rate;
av_dict_copy(&st2->metadata, st->metadata, 0);
if ((ret = avcodec_copy_context(st2->codec, st->codec)) < 0)
goto end;
}
if (!(avf2->oformat->flags & AVFMT_NOFILE)) {
if ((ret = avio_open(&avf2->pb, filename, AVIO_FLAG_WRITE)) < 0) {
av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n",
slave, av_err2str(ret));
goto end;
}
}
if ((ret = avformat_write_header(avf2, &options)) < 0) {
av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
slave, av_err2str(ret));
goto end;
}
tee_slave->avf = avf2;
tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(TeeSlave));
if (!tee_slave->bsfs) {
ret = AVERROR(ENOMEM);
goto end;
}
entry = NULL;
while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
const char *spec = entry->key + strlen("bsfs");
if (*spec) {
if (strspn(spec, slave_bsfs_spec_sep) != 1) {
av_log(avf, AV_LOG_ERROR,
"Specifier separator in '%s' is '%c', but only characters '%s' "
"are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
return AVERROR(EINVAL);
}
spec++; /* consume separator */
}
for (i = 0; i < avf2->nb_streams; i++) {
ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Invalid stream specifier '%s' in bsfs option '%s' for slave "
"output '%s'\n", spec, entry->key, filename);
goto end;
}
if (ret > 0) {
av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
"output '%s'\n", spec, entry->value, i, filename);
if (tee_slave->bsfs[i]) {
av_log(avf, AV_LOG_WARNING,
"Duplicate bsfs specification associated to stream %d of slave "
"output '%s', filters will be ignored\n", i, filename);
continue;
}
ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Error parsing bitstream filter sequence '%s' associated to "
"stream %d of slave output '%s'\n", entry->value, i, filename);
goto end;
}
}
}
av_dict_set(&options, entry->key, NULL, 0);
}
if (options) {
entry = NULL;
while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
ret = AVERROR_OPTION_NOT_FOUND;
goto end;
}
end:
av_free(format);
av_free(select);
av_dict_free(&options);
return ret;
}
static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
{
int i, ret;
AVDictionary *options = NULL;
AVDictionaryEntry *entry;
char *filename;
char *format = NULL, *select = NULL, *on_fail = NULL;
char *use_fifo = NULL, *fifo_options_str = NULL;
AVFormatContext *avf2 = NULL;
AVStream *st, *st2;
int stream_count;
int fullret;
char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
return ret;
#define STEAL_OPTION(option, field) do { \
if ((entry = av_dict_get(options, option, NULL, 0))) { \
field = entry->value; \
entry->value = NULL; /* prevent it from being freed */ \
av_dict_set(&options, option, NULL, 0); \
} \
} while (0)
STEAL_OPTION("f", format);
STEAL_OPTION("select", select);
STEAL_OPTION("onfail", on_fail);
STEAL_OPTION("use_fifo", use_fifo);
STEAL_OPTION("fifo_options", fifo_options_str);
ret = parse_slave_failure_policy_option(on_fail, tee_slave);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Invalid onfail option value, valid options are 'abort' and 'ignore'\n");
goto end;
}
ret = parse_slave_fifo_options(use_fifo, fifo_options_str, tee_slave);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR, "Error parsing fifo options: %s\n", av_err2str(ret));
goto end;
}
if (tee_slave->use_fifo) {
if (options) {
char *format_options_str = NULL;
ret = av_dict_get_string(options, &format_options_str, '=', ':');
if (ret < 0)
goto end;
ret = av_dict_set(&tee_slave->fifo_options, "format_options", format_options_str,
AV_DICT_DONT_STRDUP_VAL);
if (ret < 0)
goto end;
}
if (format) {
ret = av_dict_set(&tee_slave->fifo_options, "fifo_format", format,
AV_DICT_DONT_STRDUP_VAL);
format = NULL;
if (ret < 0)
goto end;
}
av_dict_free(&options);
options = tee_slave->fifo_options;
}
ret = avformat_alloc_output_context2(&avf2, NULL,
tee_slave->use_fifo ? "fifo" :format, filename);
if (ret < 0)
goto end;
tee_slave->avf = avf2;
av_dict_copy(&avf2->metadata, avf->metadata, 0);
avf2->opaque = avf->opaque;
avf2->io_open = avf->io_open;
avf2->io_close = avf->io_close;
avf2->interrupt_callback = avf->interrupt_callback;
avf2->flags = avf->flags;
tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
if (!tee_slave->stream_map) {
ret = AVERROR(ENOMEM);
goto end;
}
stream_count = 0;
for (i = 0; i < avf->nb_streams; i++) {
st = avf->streams[i];
if (select) {
tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
if (!tmp_select) {
ret = AVERROR(ENOMEM);
goto end;
}
fullret = 0;
first_subselect = tmp_select;
next_subselect = NULL;
while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
first_subselect = NULL;
ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Invalid stream specifier '%s' for output '%s'\n",
subselect, slave);
goto end;
}
if (ret != 0) {
fullret = 1; // match
break;
}
}
av_freep(&tmp_select);
if (fullret == 0) { /* no match */
tee_slave->stream_map[i] = -1;
continue;
}
}
tee_slave->stream_map[i] = stream_count++;
if (!(st2 = avformat_new_stream(avf2, NULL))) {
ret = AVERROR(ENOMEM);
goto end;
}
ret = ff_stream_encode_params_copy(st2, st);
if (ret < 0)
goto end;
}
ret = ff_format_output_open(avf2, filename, NULL);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
av_err2str(ret));
goto end;
}
if ((ret = avformat_write_header(avf2, &options)) < 0) {
av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
slave, av_err2str(ret));
goto end;
}
tee_slave->header_written = 1;
tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
if (!tee_slave->bsfs) {
ret = AVERROR(ENOMEM);
goto end;
}
entry = NULL;
while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
const char *spec = entry->key + strlen("bsfs");
if (*spec) {
if (strspn(spec, slave_bsfs_spec_sep) != 1) {
av_log(avf, AV_LOG_ERROR,
"Specifier separator in '%s' is '%c', but only characters '%s' "
"are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
ret = AVERROR(EINVAL);
goto end;
}
spec++; /* consume separator */
}
for (i = 0; i < avf2->nb_streams; i++) {
ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Invalid stream specifier '%s' in bsfs option '%s' for slave "
"output '%s'\n", spec, entry->key, filename);
goto end;
}
if (ret > 0) {
av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
"output '%s'\n", spec, entry->value, i, filename);
if (tee_slave->bsfs[i]) {
av_log(avf, AV_LOG_WARNING,
"Duplicate bsfs specification associated to stream %d of slave "
"output '%s', filters will be ignored\n", i, filename);
continue;
}
ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Error parsing bitstream filter sequence '%s' associated to "
"stream %d of slave output '%s'\n", entry->value, i, filename);
goto end;
}
}
}
av_dict_set(&options, entry->key, NULL, 0);
}
for (i = 0; i < avf->nb_streams; i++){
int target_stream = tee_slave->stream_map[i];
if (target_stream < 0)
continue;
if (!tee_slave->bsfs[target_stream]) {
/* Add pass-through bitstream filter */
ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Failed to create pass-through bitstream filter: %s\n",
av_err2str(ret));
goto end;
}
}
tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
avf->streams[i]->codecpar);
if (ret < 0)
goto end;
ret = av_bsf_init(tee_slave->bsfs[target_stream]);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Failed to initialize bitstream filter(s): %s\n",
av_err2str(ret));
goto end;
}
}
if (options) {
entry = NULL;
while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
ret = AVERROR_OPTION_NOT_FOUND;
goto end;
}
end:
av_free(format);
av_free(select);
av_free(on_fail);
av_dict_free(&options);
av_freep(&tmp_select);
return ret;
}