Feature: open muxer

pull/221/head
xufuji456 2 years ago
parent 891bd4afb2
commit faaba6d863
  1. 21
      app/src/main/cpp/audio_resample.cpp

@ -75,7 +75,7 @@ int init_audio_encoder(AVFormatContext *fmt_ctx, AVCodecContext **avcodec_ctx) {
return init_audio_codec(fmt_ctx, avcodec_ctx, true);
}
int init_audio_muxer(AVFormatContext **ofmt_ctx, const char* filename) {
int init_audio_muxer(AVFormatContext *ifmt_ctx, AVFormatContext **ofmt_ctx, const char* filename) {
int ret;
AVFormatContext *fmt_ctx = *ofmt_ctx;
avformat_alloc_output_context2(&fmt_ctx, nullptr, nullptr, filename);
@ -87,7 +87,21 @@ int init_audio_muxer(AVFormatContext **ofmt_ctx, const char* filename) {
return ret;
}
}
/* init muxer, write output file header */
for (int i = 0; i < ifmt_ctx->nb_streams; i++) {
AVStream* in_stream = ifmt_ctx->streams[i];
AVCodecParameters* codecpar = in_stream->codecpar;
AVCodec* dec = avcodec_find_decoder(codecpar->codec_id);
AVStream* out_stream = avformat_new_stream(fmt_ctx, dec);
if (!out_stream) {
ALOGE("Failed allocating output stream\n");
ret = AVERROR_UNKNOWN;
return ret;
}
avcodec_parameters_copy(out_stream->codecpar, codecpar);
}
ret = avformat_write_header(fmt_ctx, nullptr);
if (ret < 0) {
ALOGE("Error occurred when opening output file\n");
@ -168,7 +182,7 @@ int resampling(const char *src_filename, const char *dst_filename, int dst_rate)
goto end;
}
ret = init_audio_muxer(&oformat_ctx, dst_filename);
ret = init_audio_muxer(iformat_ctx, &oformat_ctx, dst_filename);
if (ret < 0) {
goto end;
}
@ -207,6 +221,7 @@ int resampling(const char *src_filename, const char *dst_filename, int dst_rate)
ALOGE("Could not get sample buffer size:%s\n", strerror(errno));
goto end;
}
ALOGE("resample size=%d", dst_bufsize);
ret = avcodec_encode_audio2(ocodec_ctx, opacket, frame, &got_packet_ptr);
if (ret < 0) {

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