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ffmpeg.wasm-core
Commit 3ccf22c6 authored by Nicolas George's avatar Nicolas George
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ffmpeg: keep packet/frame availability in global structures. 

This replaces the use of the no_packet and no_frame arrays.
parent b9c129be
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Showing with 20 additions and 26 deletions
ffmpeg.c
View file @ 3ccf22c6
......@@ -262,6 +262,7 @@ typedef struct InputStream {
typedef struct InputFile {
AVFormatContext *ctx;
int eof_reached; /* true if eof reached */
int unavailable; /* true if the file is unavailable (possibly temporarily) */
int ist_index; /* index of first stream in input_streams */
int64_t ts_offset;
int nb_streams; /* number of stream that ffmpeg is aware of; may be different
......@@ -325,6 +326,7 @@ typedef struct OutputStream {
double swr_dither_scale;
AVDictionary *opts;
int is_past_recording_time;
int unavailable; /* true if the steram is unavailable (possibly temporarily) */
int stream_copy;
const char *attachment_filename;
int copy_initial_nonkeyframes;
......@@ -3337,14 +3339,14 @@ static int need_output(void)
return 0;
}
static int input_acceptable(InputStream *ist, uint8_t *no_packet)
static int input_acceptable(InputStream *ist)
{
av_assert1(!ist->discard);
return !no_packet[ist->file_index] &&
return !input_files[ist->file_index]->unavailable &&
!input_files[ist->file_index]->eof_reached;
}
static int find_graph_input(FilterGraph *graph, uint8_t *no_packet)
static int find_graph_input(FilterGraph *graph)
{
int i, nb_req_max = 0, file_index = -1;
......@@ -3352,7 +3354,7 @@ static int find_graph_input(FilterGraph *graph, uint8_t *no_packet)
int nb_req = av_buffersrc_get_nb_failed_requests(graph->inputs[i]->filter);
if (nb_req > nb_req_max) {
InputStream *ist = graph->inputs[i]->ist;
if (input_acceptable(ist, no_packet)) {
if (input_acceptable(ist)) {
nb_req_max = nb_req;
file_index = ist->file_index;
}
......@@ -3365,23 +3367,20 @@ static int find_graph_input(FilterGraph *graph, uint8_t *no_packet)
/**
* Select the input file to read from.
*
* @param no_packet array of booleans, one per input file;
* if set, the input file must not be considered
* @param no_frame array of boolean, one per output stream;
* if set, the stream must not be considered;
* for internal use
* @return >=0 index of the input file to use;
* -1 if no file is acceptable;
* -2 to read from filters without reading from a file
*/
static int select_input_file(uint8_t *no_packet, uint8_t *no_frame)
static int select_input_file(void)
{
int i, ret, nb_active_out = nb_output_streams, ost_index = -1;
int64_t opts_min;
OutputStream *ost;
AVFilterBufferRef *dummy;
memset(no_frame, 0, nb_output_streams);
for (i = 0; i < nb_output_streams; i++)
nb_active_out -= output_streams[i]->unavailable =
output_streams[i]->is_past_recording_time;
while (nb_active_out) {
opts_min = INT64_MAX;
ost_index = -1;
......@@ -3389,8 +3388,7 @@ static int select_input_file(uint8_t *no_packet, uint8_t *no_frame)
OutputStream *ost = output_streams[i];
int64_t opts = av_rescale_q(ost->st->cur_dts, ost->st->time_base,
AV_TIME_BASE_Q);
if (!no_frame[i] && !ost->is_past_recording_time &&
opts < opts_min) {
if (!ost->unavailable && opts < opts_min) {
opts_min = opts;
ost_index = i;
}
......@@ -3402,7 +3400,7 @@ static int select_input_file(uint8_t *no_packet, uint8_t *no_frame)
if (ost->source_index >= 0) {
/* ost is directly connected to an input */
InputStream *ist = input_streams[ost->source_index];
if (input_acceptable(ist, no_packet))
if (input_acceptable(ist))
return ist->file_index;
} else {
/* ost is connected to a complex filtergraph */
......@@ -3411,11 +3409,11 @@ static int select_input_file(uint8_t *no_packet, uint8_t *no_frame)
AV_BUFFERSINK_FLAG_PEEK);
if (ret >= 0)
return -2;
ret = find_graph_input(ost->filter->graph, no_packet);
ret = find_graph_input(ost->filter->graph);
if (ret >= 0)
return ret;
}
no_frame[ost_index] = 1;
ost->unavailable = 1;
nb_active_out--;
}
return -1;
......@@ -3642,14 +3640,9 @@ static int transcode(void)
AVFormatContext *is, *os;
OutputStream *ost;
InputStream *ist;
uint8_t *no_packet, *no_frame;
int no_packet_count = 0;
int64_t timer_start;
if (!(no_packet = av_mallocz(nb_input_files + nb_output_streams)))
exit_program(1);
no_frame = no_packet + nb_input_files;
ret = transcode_init();
if (ret < 0)
goto fail;
......@@ -3682,7 +3675,7 @@ static int transcode(void)
}
/* select the stream that we must read now */
file_index = select_input_file(no_packet, no_frame);
file_index = select_input_file();
/* if none, if is finished */
if (file_index == -2) {
poll_filters() ;
......@@ -3691,7 +3684,8 @@ static int transcode(void)
if (file_index < 0) {
if (no_packet_count) {
no_packet_count = 0;
memset(no_packet, 0, nb_input_files);
for (i = 0; i < nb_input_files; i++)
input_files[i]->unavailable = 0;
av_usleep(10000);
continue;
}
......@@ -3703,7 +3697,7 @@ static int transcode(void)
ret = get_input_packet(input_files[file_index], &pkt);
if (ret == AVERROR(EAGAIN)) {
no_packet[file_index] = 1;
input_files[file_index]->unavailable = 1;
no_packet_count++;
continue;
}
......@@ -3729,7 +3723,8 @@ static int transcode(void)
}
no_packet_count = 0;
memset(no_packet, 0, nb_input_files);
for (i = 0; i < nb_input_files; i++)
input_files[i]->unavailable = 0;
if (do_pkt_dump) {
av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
......@@ -3866,7 +3861,6 @@ static int transcode(void)
ret = 0;
fail:
av_freep(&no_packet);
#if HAVE_PTHREADS
free_input_threads();
#endif
......
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