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#include "kitchensink/kitsource.h"
#include "kitchensink/kiterror.h"
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
Kit_Source* Kit_CreateSourceFromUrl(const char *url) {
assert(url != NULL);
Kit_Source *src = calloc(1, sizeof(Kit_Source));
if(src == NULL) {
Kit_SetError("Unable to allocate source");
return NULL;
}
// Attempt to open source
if(avformat_open_input((AVFormatContext **)&src->format_ctx, url, NULL, NULL) < 0) {
Kit_SetError("Unable to open source Url");
goto exit_0;
}
av_opt_set_int(src->format_ctx, "probesize", INT_MAX, 0);
av_opt_set_int(src->format_ctx, "analyzeduration", INT_MAX, 0);
// Fetch stream information. This may potentially take a while.
if(avformat_find_stream_info((AVFormatContext *)src->format_ctx, NULL) < 0) {
Kit_SetError("Unable to fetch source information");
goto exit_1;
}
// Find best streams for defaults
src->astream_idx = Kit_GetBestSourceStream(src, KIT_STREAMTYPE_AUDIO);
src->vstream_idx = Kit_GetBestSourceStream(src, KIT_STREAMTYPE_VIDEO);
src->sstream_idx = Kit_GetBestSourceStream(src, KIT_STREAMTYPE_SUBTITLE);
return src;
exit_1:
avformat_close_input((AVFormatContext **)&src->format_ctx);
exit_0:
free(src);
return NULL;
}
void Kit_CloseSource(Kit_Source *src) {
assert(src != NULL);
avformat_close_input((AVFormatContext **)&src->format_ctx);
free(src);
}
int Kit_GetSourceStreamInfo(const Kit_Source *src, Kit_StreamInfo *info, int index) {
assert(src != NULL);
assert(info != NULL);
AVFormatContext *format_ctx = (AVFormatContext *)src->format_ctx;
if(index < 0 || index >= format_ctx->nb_streams) {
Kit_SetError("Invalid stream index");
return 1;
}
AVStream *stream = format_ctx->streams[index];
switch(stream->codec->codec_type) {
case AVMEDIA_TYPE_UNKNOWN: info->type = KIT_STREAMTYPE_UNKNOWN; break;
case AVMEDIA_TYPE_DATA: info->type = KIT_STREAMTYPE_DATA; break;
case AVMEDIA_TYPE_VIDEO: info->type = KIT_STREAMTYPE_VIDEO; break;
case AVMEDIA_TYPE_AUDIO: info->type = KIT_STREAMTYPE_AUDIO; break;
case AVMEDIA_TYPE_SUBTITLE: info->type = KIT_STREAMTYPE_SUBTITLE; break;
case AVMEDIA_TYPE_ATTACHMENT: info->type = KIT_STREAMTYPE_ATTACHMENT; break;
default:
Kit_SetError("Unknown native stream type");
return 1;
}
info->index = index;
return 0;
}
int Kit_GetBestSourceStream(const Kit_Source *src, const Kit_StreamType type) {
assert(src != NULL);
int avmedia_type = 0;
switch(type) {
case KIT_STREAMTYPE_VIDEO: avmedia_type = AVMEDIA_TYPE_VIDEO; break;
case KIT_STREAMTYPE_AUDIO: avmedia_type = AVMEDIA_TYPE_AUDIO; break;
case KIT_STREAMTYPE_SUBTITLE: avmedia_type = AVMEDIA_TYPE_SUBTITLE; break;
default: return -1;
}
int ret = av_find_best_stream((AVFormatContext *)src->format_ctx, avmedia_type, -1, -1, NULL, 0);
if(ret == AVERROR_STREAM_NOT_FOUND) {
return -1;
}
if(ret == AVERROR_DECODER_NOT_FOUND) {
Kit_SetError("Unable to find a decoder for the stream");
return 1;
}
return ret;
}
int Kit_SetSourceStream(Kit_Source *src, const Kit_StreamType type, int index) {
assert(src != NULL);
switch(type) {
case KIT_STREAMTYPE_AUDIO: src->astream_idx = index; break;
case KIT_STREAMTYPE_VIDEO: src->vstream_idx = index; break;
case KIT_STREAMTYPE_SUBTITLE: src->sstream_idx = index; break;
default:
Kit_SetError("Invalid stream type");
return 1;
}
return 0;
}
int Kit_GetSourceStream(const Kit_Source *src, const Kit_StreamType type) {
assert(src != NULL);
switch(type) {
case KIT_STREAMTYPE_AUDIO: return src->astream_idx;
case KIT_STREAMTYPE_VIDEO: return src->vstream_idx;
case KIT_STREAMTYPE_SUBTITLE: return src->sstream_idx;
default:
break;
}
return -1;
}
int Kit_GetSourceStreamCount(const Kit_Source *src) {
assert(src != NULL);
return ((AVFormatContext *)src->format_ctx)->nb_streams;
}
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