* G.729 decoder
* Copyright (c) 2008 Vladimir Voroshilov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
} G729FormatDescription;
typedef struct {
+ int pitch_delay_int_prev; ///< integer part of previous subframe's pitch delay (4.1.3)
+
/// (2.13) LSP quantizer outputs
int16_t past_quantizer_output_buf[MA_NP + 1][10];
int16_t* past_quantizer_outputs[MA_NP + 1];
if (avctx->channels != 1) {
av_log(avctx, AV_LOG_ERROR, "Only mono sound is supported (requested channels: %d).\n", avctx->channels);
- return AVERROR_NOFMT;
+ return AVERROR(EINVAL);
}
/* Both 8kbit/s and 6.4kbit/s modes uses two subframes per frame. */
uint8_t quantizer_2nd_lo; ///< second stage lower vector of quantizer (size in bits)
uint8_t quantizer_2nd_hi; ///< second stage higher vector of quantizer (size in bits)
+ int pitch_delay_int; // pitch delay, integer part
+ int pitch_delay_3x; // pitch delay, multiplied by 3
+
if (*data_size < SUBFRAME_SIZE << 2) {
av_log(avctx, AV_LOG_ERROR, "Error processing packet: output buffer too small\n");
return AVERROR(EIO);
av_log(avctx, AV_LOG_DEBUG, "Packet type: %s\n", "G.729D @ 6.4kbit/s");
} else {
av_log(avctx, AV_LOG_ERROR, "Packet size %d is unknown.\n", buf_size);
- return (AVERROR_NOFMT);
+ return AVERROR_INVALIDDATA;
}
for (i=0; i < buf_size; i++)
gc_1st_index = get_bits(&gb, format.gc_1st_index_bits);
gc_2nd_index = get_bits(&gb, format.gc_2nd_index_bits);
+ if(!i) {
+ if (bad_pitch)
+ pitch_delay_3x = 3 * ctx->pitch_delay_int_prev;
+ else
+ pitch_delay_3x = ff_acelp_decode_8bit_to_1st_delay3(ac_index);
+ } else {
+ int pitch_delay_min = av_clip(ctx->pitch_delay_int_prev - 5,
+ PITCH_DELAY_MIN, PITCH_DELAY_MAX - 9);
+
+ if(packet_type == FORMAT_G729D_6K4)
+ pitch_delay_3x = ff_acelp_decode_4bit_to_2nd_delay3(ac_index, pitch_delay_min);
+ else
+ pitch_delay_3x = ff_acelp_decode_5_6_bit_to_2nd_delay3(ac_index, pitch_delay_min);
+ }
+
+ /* Round pitch delay to nearest (used everywhere except ff_acelp_interpolate). */
+ pitch_delay_int = (pitch_delay_3x + 1) / 3;
+
ff_acelp_weighted_vector_sum(fc + pitch_delay_int,
fc + pitch_delay_int,
fc, 1 << 14,
(!voicing && frame_erasure) ? 0 : ctx->gain_pitch,
( voicing && frame_erasure) ? 0 : ctx->gain_code,
1 << 13, 14, SUBFRAME_SIZE);
+
+ ctx->pitch_delay_int_prev = pitch_delay_int;
}
*data_size = SUBFRAME_SIZE << 2;
return buf_size;
}
-AVCodec g729_decoder =
+AVCodec ff_g729_decoder =
{
"g729",
- CODEC_TYPE_AUDIO,
+ AVMEDIA_TYPE_AUDIO,
CODEC_ID_G729,
sizeof(G729Context),
decoder_init,