* LPCM codecs for PCM formats found in MPEG streams
* Copyright (c) 2009 Christian Schmidt
*
- * 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
*/
* PCM codecs for encodings found in MPEG streams (DVD/Blu-ray)
*/
-#include "libavcore/audioconvert.h"
+#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "bytestream.h"
+#include "internal.h"
/*
* Channel Mapping according to
uint8_t channel_layout = header[2] >> 4;
if (avctx->debug & FF_DEBUG_PICT_INFO)
- dprintf(avctx, "pcm_bluray_parse_header: header = %02x%02x%02x%02x\n",
+ av_dlog(avctx, "pcm_bluray_parse_header: header = %02x%02x%02x%02x\n",
header[0], header[1], header[2], header[3]);
/* get the sample depth and derive the sample format from it */
avctx->bits_per_coded_sample = bits_per_samples[header[3] >> 6];
if (!avctx->bits_per_coded_sample) {
- av_log(avctx, AV_LOG_ERROR, "unsupported sample depth (0)\n");
+ av_log(avctx, AV_LOG_ERROR, "reserved sample depth (0)\n");
return -1;
}
avctx->sample_fmt = avctx->bits_per_coded_sample == 16 ? AV_SAMPLE_FMT_S16 :
AV_SAMPLE_FMT_S32;
+ avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;
- /* get the sample rate. Not all values are known or exist. */
+ /* get the sample rate. Not all values are used. */
switch (header[2] & 0x0f) {
case 1:
avctx->sample_rate = 48000;
break;
default:
avctx->sample_rate = 0;
- av_log(avctx, AV_LOG_ERROR, "unsupported sample rate (%d)\n",
+ av_log(avctx, AV_LOG_ERROR, "reserved sample rate (%d)\n",
header[2] & 0x0f);
return -1;
}
/*
- * get the channel number (and mapping). Not all values are known or exist.
+ * get the channel number (and mapping). Not all values are used.
* It must be noted that the number of channels in the MPEG stream can
* differ from the actual meaningful number, e.g. mono audio still has two
* channels, one being empty.
avctx->channel_layout = channel_layouts[channel_layout];
avctx->channels = channels[channel_layout];
if (!avctx->channels) {
- av_log(avctx, AV_LOG_ERROR, "unsupported channel configuration (%d)\n",
+ av_log(avctx, AV_LOG_ERROR, "reserved channel configuration (%d)\n",
channel_layout);
return -1;
}
- avctx->bit_rate = avctx->channels * avctx->sample_rate *
+ avctx->bit_rate = FFALIGN(avctx->channels, 2) * avctx->sample_rate *
avctx->bits_per_coded_sample;
if (avctx->debug & FF_DEBUG_PICT_INFO)
- dprintf(avctx,
- "pcm_bluray_parse_header: %d channels, %d bits per sample, %d kHz, %d kbit\n",
+ av_dlog(avctx,
+ "pcm_bluray_parse_header: %d channels, %d bits per sample, %d Hz, %d bit/s\n",
avctx->channels, avctx->bits_per_coded_sample,
avctx->sample_rate, avctx->bit_rate);
return 0;
}
-static int pcm_bluray_decode_frame(AVCodecContext *avctx,
- void *data,
- int *data_size,
- AVPacket *avpkt)
+typedef struct PCMBRDecode {
+ AVFrame frame;
+} PCMBRDecode;
+
+static av_cold int pcm_bluray_decode_init(AVCodecContext * avctx)
+{
+ PCMBRDecode *s = avctx->priv_data;
+
+ avcodec_get_frame_defaults(&s->frame);
+ avctx->coded_frame = &s->frame;
+
+ return 0;
+}
+
+static int pcm_bluray_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *src = avpkt->data;
int buf_size = avpkt->size;
+ PCMBRDecode *s = avctx->priv_data;
+ GetByteContext gb;
int num_source_channels, channel, retval;
- int sample_size, samples, output_size;
- int16_t *dst16 = data;
- int32_t *dst32 = data;
+ int sample_size, samples;
+ int16_t *dst16;
+ int32_t *dst32;
if (buf_size < 4) {
av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
src += 4;
buf_size -= 4;
+ bytestream2_init(&gb, src, buf_size);
+
/* There's always an even number of channels in the source */
num_source_channels = FFALIGN(avctx->channels, 2);
- sample_size = (num_source_channels * avctx->bits_per_coded_sample) >> 3;
+ sample_size = (num_source_channels * (avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
samples = buf_size / sample_size;
- output_size = samples * avctx->channels *
- (avctx->sample_fmt == AV_SAMPLE_FMT_S32 ? 4 : 2);
- if (output_size > *data_size) {
- av_log(avctx, AV_LOG_ERROR,
- "Insufficient output buffer space (%d bytes, needed %d bytes)\n",
- *data_size, output_size);
- return -1;
+ /* get output buffer */
+ s->frame.nb_samples = samples;
+ if ((retval = ff_get_buffer(avctx, &s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return retval;
}
- *data_size = output_size;
+ dst16 = (int16_t *)s->frame.data[0];
+ dst32 = (int32_t *)s->frame.data[0];
if (samples) {
switch (avctx->channel_layout) {
samples *= num_source_channels;
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
#if HAVE_BIGENDIAN
- memcpy(dst16, src, output_size);
+ bytestream2_get_buffer(&gb, dst16, buf_size);
#else
do {
- *dst16++ = bytestream_get_be16(&src);
+ *dst16++ = bytestream2_get_be16u(&gb);
} while (--samples);
#endif
} else {
do {
- *dst32++ = bytestream_get_be24(&src) << 8;
+ *dst32++ = bytestream2_get_be24u(&gb) << 8;
} while (--samples);
}
break;
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
do {
#if HAVE_BIGENDIAN
- memcpy(dst16, src, avctx->channels * 2);
+ bytestream2_get_buffer(&gb, dst16, avctx->channels * 2);
dst16 += avctx->channels;
- src += sample_size;
#else
channel = avctx->channels;
do {
- *dst16++ = bytestream_get_be16(&src);
+ *dst16++ = bytestream2_get_be16u(&gb);
} while (--channel);
- src += 2;
#endif
+ bytestream2_skip(&gb, 2);
} while (--samples);
} else {
do {
channel = avctx->channels;
do {
- *dst32++ = bytestream_get_be24(&src) << 8;
+ *dst32++ = bytestream2_get_be24u(&gb) << 8;
} while (--channel);
- src += 3;
+ bytestream2_skip(&gb, 3);
} while (--samples);
}
break;
case AV_CH_LAYOUT_5POINT1:
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
do {
- dst16[0] = bytestream_get_be16(&src);
- dst16[1] = bytestream_get_be16(&src);
- dst16[2] = bytestream_get_be16(&src);
- dst16[4] = bytestream_get_be16(&src);
- dst16[5] = bytestream_get_be16(&src);
- dst16[3] = bytestream_get_be16(&src);
+ dst16[0] = bytestream2_get_be16u(&gb);
+ dst16[1] = bytestream2_get_be16u(&gb);
+ dst16[2] = bytestream2_get_be16u(&gb);
+ dst16[4] = bytestream2_get_be16u(&gb);
+ dst16[5] = bytestream2_get_be16u(&gb);
+ dst16[3] = bytestream2_get_be16u(&gb);
dst16 += 6;
} while (--samples);
} else {
do {
- dst32[0] = bytestream_get_be24(&src) << 8;
- dst32[1] = bytestream_get_be24(&src) << 8;
- dst32[2] = bytestream_get_be24(&src) << 8;
- dst32[4] = bytestream_get_be24(&src) << 8;
- dst32[5] = bytestream_get_be24(&src) << 8;
- dst32[3] = bytestream_get_be24(&src) << 8;
+ dst32[0] = bytestream2_get_be24u(&gb) << 8;
+ dst32[1] = bytestream2_get_be24u(&gb) << 8;
+ dst32[2] = bytestream2_get_be24u(&gb) << 8;
+ dst32[4] = bytestream2_get_be24u(&gb) << 8;
+ dst32[5] = bytestream2_get_be24u(&gb) << 8;
+ dst32[3] = bytestream2_get_be24u(&gb) << 8;
dst32 += 6;
} while (--samples);
}
case AV_CH_LAYOUT_7POINT0:
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
do {
- dst16[0] = bytestream_get_be16(&src);
- dst16[1] = bytestream_get_be16(&src);
- dst16[2] = bytestream_get_be16(&src);
- dst16[5] = bytestream_get_be16(&src);
- dst16[3] = bytestream_get_be16(&src);
- dst16[4] = bytestream_get_be16(&src);
- dst16[6] = bytestream_get_be16(&src);
+ dst16[0] = bytestream2_get_be16u(&gb);
+ dst16[1] = bytestream2_get_be16u(&gb);
+ dst16[2] = bytestream2_get_be16u(&gb);
+ dst16[5] = bytestream2_get_be16u(&gb);
+ dst16[3] = bytestream2_get_be16u(&gb);
+ dst16[4] = bytestream2_get_be16u(&gb);
+ dst16[6] = bytestream2_get_be16u(&gb);
dst16 += 7;
- src += 2;
+ bytestream2_skip(&gb, 2);
} while (--samples);
} else {
do {
- dst32[0] = bytestream_get_be24(&src) << 8;
- dst32[1] = bytestream_get_be24(&src) << 8;
- dst32[2] = bytestream_get_be24(&src) << 8;
- dst32[5] = bytestream_get_be24(&src) << 8;
- dst32[3] = bytestream_get_be24(&src) << 8;
- dst32[4] = bytestream_get_be24(&src) << 8;
- dst32[6] = bytestream_get_be24(&src) << 8;
+ dst32[0] = bytestream2_get_be24u(&gb) << 8;
+ dst32[1] = bytestream2_get_be24u(&gb) << 8;
+ dst32[2] = bytestream2_get_be24u(&gb) << 8;
+ dst32[5] = bytestream2_get_be24u(&gb) << 8;
+ dst32[3] = bytestream2_get_be24u(&gb) << 8;
+ dst32[4] = bytestream2_get_be24u(&gb) << 8;
+ dst32[6] = bytestream2_get_be24u(&gb) << 8;
dst32 += 7;
- src += 3;
+ bytestream2_skip(&gb, 3);
} while (--samples);
}
break;
case AV_CH_LAYOUT_7POINT1:
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
do {
- dst16[0] = bytestream_get_be16(&src);
- dst16[1] = bytestream_get_be16(&src);
- dst16[2] = bytestream_get_be16(&src);
- dst16[6] = bytestream_get_be16(&src);
- dst16[4] = bytestream_get_be16(&src);
- dst16[5] = bytestream_get_be16(&src);
- dst16[7] = bytestream_get_be16(&src);
- dst16[3] = bytestream_get_be16(&src);
+ dst16[0] = bytestream2_get_be16u(&gb);
+ dst16[1] = bytestream2_get_be16u(&gb);
+ dst16[2] = bytestream2_get_be16u(&gb);
+ dst16[6] = bytestream2_get_be16u(&gb);
+ dst16[4] = bytestream2_get_be16u(&gb);
+ dst16[5] = bytestream2_get_be16u(&gb);
+ dst16[7] = bytestream2_get_be16u(&gb);
+ dst16[3] = bytestream2_get_be16u(&gb);
dst16 += 8;
} while (--samples);
} else {
do {
- dst32[0] = bytestream_get_be24(&src) << 8;
- dst32[1] = bytestream_get_be24(&src) << 8;
- dst32[2] = bytestream_get_be24(&src) << 8;
- dst32[6] = bytestream_get_be24(&src) << 8;
- dst32[4] = bytestream_get_be24(&src) << 8;
- dst32[5] = bytestream_get_be24(&src) << 8;
- dst32[7] = bytestream_get_be24(&src) << 8;
- dst32[3] = bytestream_get_be24(&src) << 8;
+ dst32[0] = bytestream2_get_be24u(&gb) << 8;
+ dst32[1] = bytestream2_get_be24u(&gb) << 8;
+ dst32[2] = bytestream2_get_be24u(&gb) << 8;
+ dst32[6] = bytestream2_get_be24u(&gb) << 8;
+ dst32[4] = bytestream2_get_be24u(&gb) << 8;
+ dst32[5] = bytestream2_get_be24u(&gb) << 8;
+ dst32[7] = bytestream2_get_be24u(&gb) << 8;
+ dst32[3] = bytestream2_get_be24u(&gb) << 8;
dst32 += 8;
} while (--samples);
}
}
}
- retval = src - avpkt->data;
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = s->frame;
+
+ retval = bytestream2_tell(&gb);
if (avctx->debug & FF_DEBUG_BITSTREAM)
- dprintf(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
- retval, *data_size);
- return retval;
+ av_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
+ retval, buf_size);
+ return retval + 4;
}
AVCodec ff_pcm_bluray_decoder = {
- "pcm_bluray",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_PCM_BLURAY,
- 0,
- NULL,
- NULL,
- NULL,
- pcm_bluray_decode_frame,
- .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32,
- AV_SAMPLE_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
+ .name = "pcm_bluray",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_PCM_BLURAY,
+ .priv_data_size = sizeof(PCMBRDecode),
+ .init = pcm_bluray_decode_init,
+ .decode = pcm_bluray_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .sample_fmts = (const enum AVSampleFormat[]){
+ AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE
+ },
+ .long_name = NULL_IF_CONFIG_SMALL("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
};
projects / ffmpeg / blobdiff