コード例 #1
0
  boolean record(AVFrame frame) throws Exception {
    int ret;

    av_init_packet(audio_pkt);
    audio_pkt.data(audio_outbuf);
    audio_pkt.size(audio_outbuf_size);
    if ((ret = avcodec_encode_audio2(audio_c, audio_pkt, frame, got_audio_packet)) < 0) {
      throw new Exception(
          "avcodec_encode_audio2() error " + ret + ": Could not encode audio packet.");
    } else if (frame != null) audio_clock += frame.nb_samples();
    if (got_audio_packet[0] != 0) {
      if (audio_pkt.pts() != AV_NOPTS_VALUE) {
        audio_pkt.pts(av_rescale_q(audio_pkt.pts(), audio_c.time_base(), audio_c.time_base()));
      }
      if (audio_pkt.dts() != AV_NOPTS_VALUE) {
        audio_pkt.dts(av_rescale_q(audio_pkt.dts(), audio_c.time_base(), audio_c.time_base()));
      }
      audio_pkt.flags(audio_pkt.flags() | AV_PKT_FLAG_KEY);
      audio_pkt.stream_index(audio_st.index());
    } else {
      return false;
    }

    /* write the compressed frame in the media file */
    synchronized (oc) {
      if (interleaved && video_st != null) {
        if ((ret = av_interleaved_write_frame(oc, audio_pkt)) < 0) {
          throw new Exception(
              "av_interleaved_write_frame() error "
                  + ret
                  + " while writing interleaved audio frame.");
        }
      } else {
        if ((ret = av_write_frame(oc, audio_pkt)) < 0) {
          throw new Exception("av_write_frame() error " + ret + " while writing audio frame.");
        }
      }
    }
    return true;
  }
コード例 #2
0
  @Override
  public void record(Buffer... samples) throws Exception {
    if (audio_st == null) {
      throw new Exception(
          "No audio output stream (Is audioChannels > 0 and has start() been called?)");
    }
    int ret;

    int inputSize = samples[0].limit() - samples[0].position();
    int inputFormat = AV_SAMPLE_FMT_NONE;
    int inputChannels = samples.length > 1 ? 1 : audioChannels;
    int inputDepth = 0;
    int outputFormat = audio_c.sample_fmt();
    int outputChannels = samples_out.length > 1 ? 1 : audioChannels;
    int outputDepth = av_get_bytes_per_sample(outputFormat);
    if (samples[0] instanceof ByteBuffer) {
      inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_U8P : AV_SAMPLE_FMT_U8;
      inputDepth = 1;
      for (int i = 0; i < samples.length; i++) {
        ByteBuffer b = (ByteBuffer) samples[i];
        if (samples_in[i] instanceof BytePointer
            && samples_in[i].capacity() >= inputSize
            && b.hasArray()) {
          ((BytePointer) samples_in[i]).position(0).put(b.array(), b.position(), inputSize);
        } else {
          samples_in[i] = new BytePointer(b);
        }
      }
    } else if (samples[0] instanceof ShortBuffer) {
      inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_S16P : AV_SAMPLE_FMT_S16;
      inputDepth = 2;
      for (int i = 0; i < samples.length; i++) {
        ShortBuffer b = (ShortBuffer) samples[i];
        if (samples_in[i] instanceof ShortPointer
            && samples_in[i].capacity() >= inputSize
            && b.hasArray()) {
          ((ShortPointer) samples_in[i])
              .position(0)
              .put(b.array(), samples[i].position(), inputSize);
        } else {
          samples_in[i] = new ShortPointer(b);
        }
      }
    } else if (samples[0] instanceof IntBuffer) {
      inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_S32P : AV_SAMPLE_FMT_S32;
      inputDepth = 4;
      for (int i = 0; i < samples.length; i++) {
        IntBuffer b = (IntBuffer) samples[i];
        if (samples_in[i] instanceof IntPointer
            && samples_in[i].capacity() >= inputSize
            && b.hasArray()) {
          ((IntPointer) samples_in[i]).position(0).put(b.array(), samples[i].position(), inputSize);
        } else {
          samples_in[i] = new IntPointer(b);
        }
      }
    } else if (samples[0] instanceof FloatBuffer) {
      inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_FLTP : AV_SAMPLE_FMT_FLT;
      inputDepth = 4;
      for (int i = 0; i < samples.length; i++) {
        FloatBuffer b = (FloatBuffer) samples[i];
        if (samples_in[i] instanceof FloatPointer
            && samples_in[i].capacity() >= inputSize
            && b.hasArray()) {
          ((FloatPointer) samples_in[i]).position(0).put(b.array(), b.position(), inputSize);
        } else {
          samples_in[i] = new FloatPointer(b);
        }
      }
    } else if (samples[0] instanceof DoubleBuffer) {
      inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_DBLP : AV_SAMPLE_FMT_DBL;
      inputDepth = 8;
      for (int i = 0; i < samples.length; i++) {
        DoubleBuffer b = (DoubleBuffer) samples[i];
        if (samples_in[i] instanceof DoublePointer
            && samples_in[i].capacity() >= inputSize
            && b.hasArray()) {
          ((DoublePointer) samples_in[i]).position(0).put(b.array(), b.position(), inputSize);
        } else {
          samples_in[i] = new DoublePointer(b);
        }
      }
    } else {
      throw new Exception("Audio samples Buffer has unsupported type: " + samples);
    }

    if (samples_convert_ctx == null) {
      samples_convert_ctx =
          swr_alloc_set_opts(
              null,
              audio_c.channel_layout(),
              outputFormat,
              audio_c.sample_rate(),
              audio_c.channel_layout(),
              inputFormat,
              audio_c.sample_rate(),
              0,
              null);
      if (samples_convert_ctx == null) {
        throw new Exception("swr_alloc_set_opts() error: Cannot allocate the conversion context.");
      } else if ((ret = swr_init(samples_convert_ctx)) < 0) {
        throw new Exception(
            "swr_init() error " + ret + ": Cannot initialize the conversion context.");
      }
    }

    for (int i = 0; i < samples.length; i++) {
      samples_in[i]
          .position(samples_in[i].position() * inputDepth)
          .limit((samples_in[i].position() + inputSize) * inputDepth);
    }
    while (samples_in[0].position() < samples_in[0].limit()) {
      int inputCount =
          (samples_in[0].limit() - samples_in[0].position()) / (inputChannels * inputDepth);
      int outputCount =
          (samples_out[0].limit() - samples_out[0].position()) / (outputChannels * outputDepth);
      int count = Math.min(inputCount, outputCount);
      for (int i = 0; i < samples.length; i++) {
        samples_in_ptr.put(i, samples_in[i]);
      }
      for (int i = 0; i < samples_out.length; i++) {
        samples_out_ptr.put(i, samples_out[i]);
      }
      if ((ret = swr_convert(samples_convert_ctx, samples_out_ptr, count, samples_in_ptr, count))
          < 0) {
        throw new Exception("swr_convert() error " + ret + ": Cannot convert audio samples.");
      }
      for (int i = 0; i < samples.length; i++) {
        samples_in[i].position(samples_in[i].position() + ret * inputChannels * inputDepth);
      }
      for (int i = 0; i < samples_out.length; i++) {
        samples_out[i].position(samples_out[i].position() + ret * outputChannels * outputDepth);
      }

      if (samples_out[0].position() >= samples_out[0].limit()) {
        frame.nb_samples(audio_input_frame_size);
        avcodec_fill_audio_frame(
            frame, audio_c.channels(), outputFormat, samples_out[0], samples_out[0].limit(), 0);
        for (int i = 0; i < samples_out.length; i++) {
          frame.data(i, samples_out[i].position(0));
          frame.linesize(i, samples_out[i].limit());
        }
        frame.quality(audio_c.global_quality());
        record(frame);
      }
    }
    return;
  }