Recherche avancée

Sur d’autres sites (10024)

• how to play mp3 using ffmpeg

  5 novembre 2013, par Ari

  I'm trying to play audio mp3 file using ffmpeg in android
  but I'm facing a problem in the below mentioned code

  how to play mp3 using ffmpeg

   void JNICALL  Java_com_music_MainActivity_loadFile(JNIEnv* env, jobject obj,jstring file,jbyteArray array)
  
  {
  
      jboolean            isfilenameCopy;
  
      const char *        filename = (*env)->GetStringUTFChars(env, file, &isfilenameCopy);
  
      AVCodec *codec;
  
      AVCodecContext *c= NULL;
  
      int out_size, len;
  
      FILE *f, *outfile;
  
      uint8_t *outbuf;
  
      uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
  
      AVPacket avpkt;
  
      jclass              cls = (*env)->GetObjectClass(env, obj);
  
      jmethodID           play = (*env)->GetMethodID(env, cls, "playSound", "([BI)V");//At the begining of your main function
  
  
  
      av_init_packet(&avpkt);
  
  
  
      printf("Audio decoding\n");
  
  
  
  
  
      __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "inside load file");
  
      /* find the mpeg audio decoder */
  
      codec = avcodec_find_decoder(CODEC_ID_MP3);
  
      if (!codec) {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
  
  
      c= avcodec_alloc_context();
  
  
  
      /* open it */
  
      if (avcodec_open(c, codec) < 0) {
  
          fprintf(stderr, "could not open codec\n");
  
          exit(1);
  
      }
  
  
  
      __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "open avcode");
  
      outbuf = malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);
  
     __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "open %s",outbuf);
  
  
  
      f = fopen(filename, "rb");
  
      if (!f) {
  
          fprintf(stderr, "could not open %s\n", filename);
  
          exit(1);
  
      }
  
  
  
      /* decode until eof */
  
      avpkt.data = inbuf;
  
      avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
  
      __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "data =%s and size %d",avpkt.data,avpkt.size);
  
      while (avpkt.size > 0) {
  
          out_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
  
          len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);
  
          __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "length =%d",len);
  
          if (len < 0) {
  
              fprintf(stderr, "Error while decoding\n");
  
              __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, " failed length =%d",errno);
  
  
  
              exit(1);
  
          }
  
          if (out_size > 0) {
  
              /* if a frame has been decoded, output it */
  
              jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
  
              memcpy(bytes, outbuf, out_size); //
  
              (*env)->ReleaseByteArrayElements(env, array, bytes, 0);
  
              (*env)->CallVoidMethod(env, obj, play, array, out_size);
  
  
  
          }
  
          avpkt.size -= len;
  
          avpkt.data += len;
  
          if (avpkt.size < AUDIO_REFILL_THRESH) {
  
              /* Refill the input buffer, to avoid trying to decode
  
               * incomplete frames. Instead of this, one could also use
  
               * a parser, or use a proper container format through
  
               * libavformat. */
  
              memmove(inbuf, avpkt.data, avpkt.size);
  
              avpkt.data = inbuf;
  
              len = fread(avpkt.data + avpkt.size, 1,
  
                          AUDIO_INBUF_SIZE - avpkt.size, f);
  
              if (len > 0)
  
                  avpkt.size += len;
  
          }
  
      }
  
  
  
      fclose(f);
  
      free(outbuf);
  
  
  
      avcodec_close(c);
  
      av_free(c);
  
  }

  i am getting the len = - 1 in

  len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);

  what am i doing wrong ??

  please help

• AAC encoder : fix assertion error re SF differences

  12 octobre 2015, par Claudio Freire

  AAC encoder : fix assertion error re SF differences
  Intermediate results can indeed violate SF delta. Instead of asserting
  
  there, just make the code safe, and assert on the final result.
  Also re-clamp SFs more often in short windows (which tend to violate
  
  the restriction when encoding the switch from one window to the other)
  

  • [DH] libavcodec/aaccoder_twoloop.h

• Merge commit ’0c082565965258dca143767cc6cb25e38b6e9ea3’

  12 février 2014, par Michael Niedermayer

  Merge commit ’0c082565965258dca143767cc6cb25e38b6e9ea3’
  * commit ’0c082565965258dca143767cc6cb25e38b6e9ea3’ :
  
    asfdec : short-circuit seeking to the start of stream
  Conflicts :
  
  	libavformat/asfdec.c
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/asfdec.c