* TTA (The Lossless True Audio) decoder
* Copyright (c) 2006 Alex Beregszaszi
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
TTAChannel *ch_ctx;
} TTAContext;
-#if 0
-static inline int shift_1(int i)
-{
- if (i < 32)
- return 1 << i;
- else
- return 0x80000000; // 16 << 31
-}
-
-static inline int shift_16(int i)
-{
- if (i < 28)
- return 16 << i;
- else
- return 0x80000000; // 16 << 27
-}
-#else
static const uint32_t shift_1[] = {
0x00000001, 0x00000002, 0x00000004, 0x00000008,
0x00000010, 0x00000020, 0x00000040, 0x00000080,
};
static const uint32_t * const shift_16 = shift_1 + 4;
-#endif
static const int32_t ttafilter_configs[4][2] = {
{10, 1},
return ret;
}
+static const int64_t tta_channel_layouts[7] = {
+ AV_CH_LAYOUT_STEREO,
+ AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
+ AV_CH_LAYOUT_QUAD,
+ 0,
+ AV_CH_LAYOUT_5POINT1_BACK,
+ AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
+ AV_CH_LAYOUT_7POINT1_WIDE
+};
+
static av_cold int tta_decode_init(AVCodecContext * avctx)
{
TTAContext *s = avctx->priv_data;
if (avctx->extradata_size < 30)
return -1;
- init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size);
+ init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
if (show_bits_long(&s->gb, 32) == AV_RL32("TTA1"))
{
/* signature */
}
s->is_float = (s->flags == FORMAT_FLOAT);
avctx->channels = s->channels = get_bits(&s->gb, 16);
+ if (s->channels > 1 && s->channels < 9)
+ avctx->channel_layout = tta_channel_layouts[s->channels-2];
avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
s->bps = (avctx->bits_per_coded_sample + 7) / 8;
avctx->sample_rate = get_bits_long(&s->gb, 32);
return -1;
}
else switch(s->bps) {
-// case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
+ case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
case 2: avctx->sample_fmt = AV_SAMPLE_FMT_S16; break;
-// case 3: avctx->sample_fmt = AV_SAMPLE_FMT_S24; break;
+ case 3: avctx->bits_per_coded_sample = 24;
case 4: avctx->sample_fmt = AV_SAMPLE_FMT_S32; break;
default:
av_log_ask_for_sample(s->avctx,
}
s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
+ if (!s->decode_buffer)
+ return AVERROR(ENOMEM);
s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
if (!s->ch_ctx)
return AVERROR(ENOMEM);
int cur_chan = 0, framelen = s->frame_length;
int32_t *p;
- if (*data_size < (framelen * s->channels * 2)) {
+ if (*data_size < (framelen * s->channels * av_get_bits_per_sample_fmt(avctx->sample_fmt) / 8)) {
av_log(avctx, AV_LOG_ERROR, "Output buffer size is too small.\n");
return -1;
}
}
*predictor = *p;
-#if 0
- // extract 32bit float from last two int samples
- if (s->is_float && ((p - data) & 1)) {
- uint32_t neg = *p & 0x80000000;
- uint32_t hi = *(p - 1);
- uint32_t lo = abs(*p) - 1;
-
- hi += (hi || lo) ? 0x3f80 : 0;
- // SWAP16: swap all the 16 bits
- *(p - 1) = (hi << 16) | SWAP16(lo) | neg;
- }
-#endif
-
/*if ((get_bits_count(&s->gb)+7)/8 > buf_size)
{
av_log(NULL, AV_LOG_INFO, "overread!!\n");
// convert to output buffer
switch(s->bps) {
+ case 1: {
+ uint8_t *samples = data;
+ for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
+ *samples++ = *p + 0x80;
+ *data_size = samples - (uint8_t *)data;
+ break;
+ }
case 2: {
uint16_t *samples = data;
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
*data_size = (uint8_t *)samples - (uint8_t *)data;
break;
}
+ case 3: {
+ int32_t *samples = data;
+ for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
+ *samples++ = AV_RN32(p) << 8;
+ *data_size = (uint8_t *)samples - (uint8_t *)data;
+ break;
+ }
default:
av_log(s->avctx, AV_LOG_ERROR, "Error, only 16bit samples supported!\n");
}
}
AVCodec ff_tta_decoder = {
- "tta",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_TTA,
- sizeof(TTAContext),
- tta_decode_init,
- NULL,
- tta_decode_close,
- tta_decode_frame,
+ .name = "tta",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_TTA,
+ .priv_data_size = sizeof(TTAContext),
+ .init = tta_decode_init,
+ .close = tta_decode_close,
+ .decode = tta_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("True Audio (TTA)"),
};
projects / ffmpeg / blobdiff