static void gst_flac_dec_error_cb (const FLAC__StreamDecoder * d, FLAC__StreamDecoderErrorStatus status, void *client_data) { const gchar *error; GstFlacDec *dec; dec = GST_FLAC_DEC (client_data); switch (status) { case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC: /* Ignore this error and keep processing */ return; case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER: error = "bad header"; break; case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH: error = "CRC mismatch"; break; default: error = "unknown error"; break; } if (gst_flac_dec_handle_decoder_error (dec, FALSE)) GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("%s (%d)", error, status)); }
static gboolean gst_flac_dec_set_format (GstAudioDecoder * dec, GstCaps * caps) { const GValue *headers; GstFlacDec *flacdec; GstStructure *s; guint i, num; flacdec = GST_FLAC_DEC (dec); GST_LOG_OBJECT (dec, "sink caps: %" GST_PTR_FORMAT, caps); s = gst_caps_get_structure (caps, 0); headers = gst_structure_get_value (s, "streamheader"); if (headers == NULL || !GST_VALUE_HOLDS_ARRAY (headers)) { GST_WARNING_OBJECT (dec, "no 'streamheader' field in input caps, try " "adding a flacparse element upstream"); return FALSE; } if (gst_adapter_available (flacdec->adapter) > 0) { GST_WARNING_OBJECT (dec, "unexpected data left in adapter"); gst_adapter_clear (flacdec->adapter); } num = gst_value_array_get_size (headers); for (i = 0; i < num; ++i) { const GValue *header_val; GstBuffer *header_buf; header_val = gst_value_array_get_value (headers, i); if (header_val == NULL || !GST_VALUE_HOLDS_BUFFER (header_val)) return FALSE; header_buf = g_value_dup_boxed (header_val); GST_INFO_OBJECT (dec, "pushing header buffer of %" G_GSIZE_FORMAT " bytes " "into adapter", gst_buffer_get_size (header_buf)); gst_adapter_push (flacdec->adapter, header_buf); } GST_DEBUG_OBJECT (dec, "Processing headers and metadata"); if (!FLAC__stream_decoder_process_until_end_of_metadata (flacdec->decoder)) { GST_WARNING_OBJECT (dec, "process_until_end_of_metadata failed"); if (FLAC__stream_decoder_get_state (flacdec->decoder) == FLAC__STREAM_DECODER_ABORTED) { GST_WARNING_OBJECT (flacdec, "Read callback caused internal abort"); /* allow recovery */ gst_adapter_clear (flacdec->adapter); FLAC__stream_decoder_flush (flacdec->decoder); gst_flac_dec_handle_decoder_error (flacdec, TRUE); } } GST_INFO_OBJECT (dec, "headers and metadata are now processed"); return TRUE; }
static GstFlowReturn gst_flac_dec_handle_frame (GstAudioDecoder * audio_dec, GstBuffer * buf) { GstFlacDec *dec; dec = GST_FLAC_DEC (audio_dec); /* drain remaining data? */ if (G_UNLIKELY (buf == NULL)) { gst_flac_dec_flush (audio_dec, FALSE); return GST_FLOW_OK; } GST_LOG_OBJECT (dec, "frame: ts %" GST_TIME_FORMAT ", flags 0x%04x, " "%" G_GSIZE_FORMAT " bytes", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_FLAGS (buf), gst_buffer_get_size (buf)); /* drop any in-stream headers, we've processed those in set_format already */ if (G_UNLIKELY (!dec->got_headers)) { gboolean got_audio_frame; GstMapInfo map; /* check if this is a flac audio frame (rather than a header or junk) */ gst_buffer_map (buf, &map, GST_MAP_READ); got_audio_frame = gst_flac_dec_scan_got_frame (dec, map.data, map.size); gst_buffer_unmap (buf, &map); if (!got_audio_frame) { GST_INFO_OBJECT (dec, "dropping in-stream header, %" G_GSIZE_FORMAT " " "bytes", map.size); gst_audio_decoder_finish_frame (audio_dec, NULL, 1); return GST_FLOW_OK; } GST_INFO_OBJECT (dec, "first audio frame, got all in-stream headers now"); dec->got_headers = TRUE; } gst_adapter_push (dec->adapter, gst_buffer_ref (buf)); buf = NULL; dec->last_flow = GST_FLOW_OK; /* framed - there should always be enough data to decode something */ GST_LOG_OBJECT (dec, "%" G_GSIZE_FORMAT " bytes available", gst_adapter_available (dec->adapter)); if (!FLAC__stream_decoder_process_single (dec->decoder)) { GST_INFO_OBJECT (dec, "process_single failed"); if (FLAC__stream_decoder_get_state (dec->decoder) == FLAC__STREAM_DECODER_ABORTED) { GST_WARNING_OBJECT (dec, "Read callback caused internal abort"); /* allow recovery */ gst_adapter_clear (dec->adapter); FLAC__stream_decoder_flush (dec->decoder); gst_flac_dec_handle_decoder_error (dec, TRUE); } } return dec->last_flow; }