Exemple #1
0
AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
                                                            int perms)
{
    AVFilterBufferRef *samplesref;
    int channels = av_frame_get_channels(frame);
    int64_t layout = av_frame_get_channel_layout(frame);

    if(av_frame_get_channels(frame) > 8) // libavfilter does not suport more than 8 channels FIXME, remove once libavfilter is fixed
        return NULL;

    if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) {
        av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
        return NULL;
    }

    samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels(
        (uint8_t **)frame->data, frame->linesize[0], perms,
        frame->nb_samples, frame->format, channels, layout);
    if (!samplesref)
        return NULL;
    if (avfilter_copy_frame_props(samplesref, frame) < 0) {
        samplesref->buf->data[0] = NULL;
        avfilter_unref_bufferp(&samplesref);
    }
    return samplesref;
}
Exemple #2
0
string AudioSamples::channelsLayoutString() const
{
    if (!m_raw)
        return "";
    char buf[128] = {0};
    av_get_channel_layout_string(buf,
                                 sizeof(buf),
                                 av_frame_get_channels(m_raw),
                                 av_frame_get_channel_layout(m_raw));
    return string(buf);
}
Exemple #3
0
AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
                                                            int perms)
{
    AVFilterBufferRef *picref =
        avfilter_get_audio_buffer_ref_from_arrays((uint8_t **)frame->data, frame->linesize[0], perms,
                                                  frame->nb_samples, frame->format,
                                                  av_frame_get_channel_layout(frame));
    if (!picref)
        return NULL;
    avfilter_copy_frame_props(picref, frame);
    return picref;
}
Exemple #4
0
static void print_frame(const AVFrame *frame)
{
    const int n = frame->nb_samples * av_get_channel_layout_nb_channels(av_frame_get_channel_layout(frame));
    const uint16_t *p     = (uint16_t*)frame->data[0];
    const uint16_t *p_end = p + n;

    while (p < p_end) {
        fputc(*p    & 0xff, stdout);
        fputc(*p>>8 & 0xff, stdout);
        p++;
    }
    fflush(stdout);
}
Exemple #5
0
AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame,
        int perms)
{
    AVFilterBufferRef *samplesref =
        avfilter_get_audio_buffer_ref_from_arrays((uint8_t **)frame->data, frame->linesize[0], perms,
                frame->nb_samples, frame->format,
                av_frame_get_channel_layout(frame));
    if (!samplesref)
        return NULL;
    if (avfilter_copy_frame_props(samplesref, frame) < 0) {
        samplesref->buf->data[0] = NULL;
        avfilter_unref_bufferp(&samplesref);
    }
    return samplesref;
}
Exemple #6
0
static gboolean
settings_changed (GstFFMpegAudDec * ffmpegdec, AVFrame * frame)
{
  GstAudioFormat format;
  gint channels =
      av_get_channel_layout_nb_channels (av_frame_get_channel_layout (frame));

  format = gst_ffmpeg_smpfmt_to_audioformat (frame->format);
  if (format == GST_AUDIO_FORMAT_UNKNOWN)
    return TRUE;

  return !(ffmpegdec->info.rate ==
      av_frame_get_sample_rate (frame) &&
      ffmpegdec->info.channels == channels &&
      ffmpegdec->info.finfo->format == format);
}
Exemple #7
0
void emit_frame(const AVFrame *frame)
{
    const int n = frame->nb_samples * av_get_channel_layout_nb_channels(av_frame_get_channel_layout(frame));
    const uint16_t *p     = (uint16_t*)frame->data[0];
    const uint16_t *p_end = p + n;

#if 0
    while (p < p_end) {
        fputc(*p    & 0xff, stdout);
        fputc(*p>>8 & 0xff, stdout);
        p++;
    }
#else
    static int a = 0; a += n;
    int64_t dur = av_frame_get_pkt_duration(frame); // in AVStream->time_base units
    double seconds = (double(dur) * timebase.num) / timebase.den;
    static double s = 0; s += seconds;
    printf("another %d samples, %f seconds, respective totals %d %f\n", n, seconds, a, s);
#endif
    fflush(stdout);
}
Exemple #8
0
static gboolean
gst_ffmpegauddec_negotiate (GstFFMpegAudDec * ffmpegdec,
    AVCodecContext * context, AVFrame * frame, gboolean force)
{
  GstFFMpegAudDecClass *oclass;
  GstAudioFormat format;
  gint channels;
  GstAudioChannelPosition pos[64] = { 0, };

  oclass = (GstFFMpegAudDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));

  format = gst_ffmpeg_smpfmt_to_audioformat (frame->format);
  if (format == GST_AUDIO_FORMAT_UNKNOWN)
    goto no_caps;
  channels =
      av_get_channel_layout_nb_channels (av_frame_get_channel_layout (frame));
  if (channels == 0)
    channels = av_frame_get_channels (frame);
  if (channels == 0)
    goto no_caps;

  if (!force && !settings_changed (ffmpegdec, frame))
    return TRUE;

  GST_DEBUG_OBJECT (ffmpegdec,
      "Renegotiating audio from %dHz@%dchannels (%d) to %dHz@%dchannels (%d)",
      ffmpegdec->info.rate, ffmpegdec->info.channels,
      ffmpegdec->info.finfo->format, av_frame_get_sample_rate (frame), channels,
      format);

  gst_ffmpeg_channel_layout_to_gst (av_frame_get_channel_layout (frame),
      channels, pos);
  memcpy (ffmpegdec->ffmpeg_layout, pos,
      sizeof (GstAudioChannelPosition) * channels);

  /* Get GStreamer channel layout */
  gst_audio_channel_positions_to_valid_order (pos, channels);
  ffmpegdec->needs_reorder =
      memcmp (pos, ffmpegdec->ffmpeg_layout, sizeof (pos[0]) * channels) != 0;
  gst_audio_info_set_format (&ffmpegdec->info, format,
      av_frame_get_sample_rate (frame), channels, pos);

  if (!gst_audio_decoder_set_output_format (GST_AUDIO_DECODER (ffmpegdec),
          &ffmpegdec->info))
    goto caps_failed;

  return TRUE;

  /* ERRORS */
no_caps:
  {
#ifdef HAVE_LIBAV_UNINSTALLED
    /* using internal ffmpeg snapshot */
    GST_ELEMENT_ERROR (ffmpegdec, CORE, NEGOTIATION,
        ("Could not find GStreamer caps mapping for libav codec '%s'.",
            oclass->in_plugin->name), (NULL));
#else
    /* using external ffmpeg */
    GST_ELEMENT_ERROR (ffmpegdec, CORE, NEGOTIATION,
        ("Could not find GStreamer caps mapping for libav codec '%s', and "
            "you are using an external libavcodec. This is most likely due to "
            "a packaging problem and/or libavcodec having been upgraded to a "
            "version that is not compatible with this version of "
            "gstreamer-libav. Make sure your gstreamer-libav and libavcodec "
            "packages come from the same source/repository.",
            oclass->in_plugin->name), (NULL));
#endif
    return FALSE;
  }
caps_failed:
  {
    GST_ELEMENT_ERROR (ffmpegdec, CORE, NEGOTIATION, (NULL),
        ("Could not set caps for libav decoder (%s), not fixed?",
            oclass->in_plugin->name));
    memset (&ffmpegdec->info, 0, sizeof (ffmpegdec->info));

    return FALSE;
  }
}
Exemple #9
0
int64_t AudioSamples::channelsLayout() const
{
    return m_raw ? av_frame_get_channel_layout(m_raw) : 0;
}