#include <limits.h>
-#include "libavutil/audioconvert.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
#include "avcodec.h"
#include "internal.h"
int got_streaminfo; ///< indicates if the STREAMINFO has been read
int32_t *decoded[FLAC_MAX_CHANNELS]; ///< decoded samples
+ uint8_t *decoded_buffer;
+ unsigned int decoded_buffer_size;
FLACDSPContext dsp;
} FLACContext;
-static const int64_t flac_channel_layouts[6] = {
- AV_CH_LAYOUT_MONO,
- AV_CH_LAYOUT_STEREO,
- AV_CH_LAYOUT_SURROUND,
- AV_CH_LAYOUT_QUAD,
- AV_CH_LAYOUT_5POINT0,
- AV_CH_LAYOUT_5POINT1
-};
-
-static void allocate_buffers(FLACContext *s);
+static int allocate_buffers(FLACContext *s);
static void flac_set_bps(FLACContext *s)
{
{
enum FLACExtradataFormat format;
uint8_t *streaminfo;
+ int ret;
FLACContext *s = avctx->priv_data;
s->avctx = avctx;
/* initialize based on the demuxer-supplied streamdata header */
avpriv_flac_parse_streaminfo(avctx, (FLACStreaminfo *)s, streaminfo);
- allocate_buffers(s);
+ ret = allocate_buffers(s);
+ if (ret < 0)
+ return ret;
flac_set_bps(s);
ff_flacdsp_init(&s->dsp, avctx->sample_fmt, s->bps);
s->got_streaminfo = 1;
avcodec_get_frame_defaults(&s->frame);
avctx->coded_frame = &s->frame;
- if (avctx->channels <= FF_ARRAY_ELEMS(flac_channel_layouts))
- avctx->channel_layout = flac_channel_layouts[avctx->channels - 1];
-
return 0;
}
av_log(avctx, AV_LOG_DEBUG, " Bits: %d\n", s->bps);
}
-static void allocate_buffers(FLACContext *s)
+static int allocate_buffers(FLACContext *s)
{
- int i;
+ int buf_size;
assert(s->max_blocksize);
- for (i = 0; i < s->channels; i++) {
- s->decoded[i] = av_malloc(sizeof(int32_t)*s->max_blocksize);
- }
+ buf_size = av_samples_get_buffer_size(NULL, s->channels, s->max_blocksize,
+ AV_SAMPLE_FMT_S32P, 0);
+ if (buf_size < 0)
+ return buf_size;
+
+ av_fast_malloc(&s->decoded_buffer, &s->decoded_buffer_size, buf_size);
+ if (!s->decoded_buffer)
+ return AVERROR(ENOMEM);
+
+ return av_samples_fill_arrays((uint8_t **)s->decoded, NULL,
+ s->decoded_buffer, s->channels,
+ s->max_blocksize, AV_SAMPLE_FMT_S32P, 0);
}
/**
*/
static int parse_streaminfo(FLACContext *s, const uint8_t *buf, int buf_size)
{
- int metadata_type, metadata_size;
+ int metadata_type, metadata_size, ret;
if (buf_size < FLAC_STREAMINFO_SIZE+8) {
/* need more data */
return AVERROR_INVALIDDATA;
}
avpriv_flac_parse_streaminfo(s->avctx, (FLACStreaminfo *)s, &buf[8]);
- allocate_buffers(s);
+ ret = allocate_buffers(s);
+ if (ret < 0)
+ return ret;
flac_set_bps(s);
ff_flacdsp_init(&s->dsp, s->avctx->sample_fmt, s->bps);
s->got_streaminfo = 1;
return buf_size - (buf_end - buf);
}
-static int decode_residuals(FLACContext *s, int channel, int pred_order)
+static int decode_residuals(FLACContext *s, int32_t *decoded, int pred_order)
{
int i, tmp, partition, method_type, rice_order;
- int sample = 0, samples;
+ int rice_bits, rice_esc;
+ int samples;
method_type = get_bits(&s->gb, 2);
if (method_type > 1) {
return -1;
}
- sample=
+ rice_bits = 4 + method_type;
+ rice_esc = (1 << rice_bits) - 1;
+
+ decoded += pred_order;
i= pred_order;
for (partition = 0; partition < (1 << rice_order); partition++) {
- tmp = get_bits(&s->gb, method_type == 0 ? 4 : 5);
- if (tmp == (method_type == 0 ? 15 : 31)) {
+ tmp = get_bits(&s->gb, rice_bits);
+ if (tmp == rice_esc) {
tmp = get_bits(&s->gb, 5);
- for (; i < samples; i++, sample++)
- s->decoded[channel][sample] = get_sbits_long(&s->gb, tmp);
+ for (; i < samples; i++)
+ *decoded++ = get_sbits_long(&s->gb, tmp);
} else {
- for (; i < samples; i++, sample++) {
- s->decoded[channel][sample] = get_sr_golomb_flac(&s->gb, tmp, INT_MAX, 0);
+ for (; i < samples; i++) {
+ *decoded++ = get_sr_golomb_flac(&s->gb, tmp, INT_MAX, 0);
}
}
i= 0;
return 0;
}
-static int decode_subframe_fixed(FLACContext *s, int channel, int pred_order,
- int bps)
+static int decode_subframe_fixed(FLACContext *s, int32_t *decoded,
+ int pred_order, int bps)
{
const int blocksize = s->blocksize;
- int32_t *decoded = s->decoded[channel];
int a, b, c, d, i;
/* warm up samples */
decoded[i] = get_sbits_long(&s->gb, bps);
}
- if (decode_residuals(s, channel, pred_order) < 0)
+ if (decode_residuals(s, decoded, pred_order) < 0)
return -1;
if (pred_order > 0)
return 0;
}
-static int decode_subframe_lpc(FLACContext *s, int channel, int pred_order,
+static int decode_subframe_lpc(FLACContext *s, int32_t *decoded, int pred_order,
int bps)
{
int i;
int coeff_prec, qlevel;
int coeffs[32];
- int32_t *decoded = s->decoded[channel];
/* warm up samples */
for (i = 0; i < pred_order; i++) {
coeffs[pred_order - i - 1] = get_sbits(&s->gb, coeff_prec);
}
- if (decode_residuals(s, channel, pred_order) < 0)
+ if (decode_residuals(s, decoded, pred_order) < 0)
return -1;
s->dsp.lpc(decoded, coeffs, pred_order, qlevel, s->blocksize);
static inline int decode_subframe(FLACContext *s, int channel)
{
+ int32_t *decoded = s->decoded[channel];
int type, wasted = 0;
int bps = s->bps;
int i, tmp;
bps -= wasted;
}
if (bps > 32) {
- av_log_missing_feature(s->avctx, "decorrelated bit depth > 32", 0);
- return -1;
+ av_log_missing_feature(s->avctx, "Decorrelated bit depth > 32", 0);
+ return AVERROR_PATCHWELCOME;
}
//FIXME use av_log2 for types
if (type == 0) {
tmp = get_sbits_long(&s->gb, bps);
for (i = 0; i < s->blocksize; i++)
- s->decoded[channel][i] = tmp;
+ decoded[i] = tmp;
} else if (type == 1) {
for (i = 0; i < s->blocksize; i++)
- s->decoded[channel][i] = get_sbits_long(&s->gb, bps);
+ decoded[i] = get_sbits_long(&s->gb, bps);
} else if ((type >= 8) && (type <= 12)) {
- if (decode_subframe_fixed(s, channel, type & ~0x8, bps) < 0)
+ if (decode_subframe_fixed(s, decoded, type & ~0x8, bps) < 0)
return -1;
} else if (type >= 32) {
- if (decode_subframe_lpc(s, channel, (type & ~0x20)+1, bps) < 0)
+ if (decode_subframe_lpc(s, decoded, (type & ~0x20)+1, bps) < 0)
return -1;
} else {
av_log(s->avctx, AV_LOG_ERROR, "invalid coding type\n");
if (wasted) {
int i;
for (i = 0; i < s->blocksize; i++)
- s->decoded[channel][i] <<= wasted;
+ decoded[i] <<= wasted;
}
return 0;
static int decode_frame(FLACContext *s)
{
- int i;
+ int i, ret;
GetBitContext *gb = &s->gb;
FLACFrameInfo fi;
return -1;
}
- if (s->channels && fi.channels != s->channels) {
- av_log(s->avctx, AV_LOG_ERROR, "switching channel layout mid-stream "
- "is not supported\n");
- return -1;
+ if (s->channels && fi.channels != s->channels && s->got_streaminfo) {
+ s->channels = s->avctx->channels = fi.channels;
+ ff_flac_set_channel_layout(s->avctx);
+ ret = allocate_buffers(s);
+ if (ret < 0)
+ return ret;
}
s->channels = s->avctx->channels = fi.channels;
+ if (!s->avctx->channel_layout && s->channels <= 6)
+ ff_flac_set_channel_layout(s->avctx);
s->ch_mode = fi.ch_mode;
if (!s->bps && !fi.bps) {
" or frame header\n");
return -1;
}
- if (fi.samplerate == 0) {
+ if (fi.samplerate == 0)
fi.samplerate = s->samplerate;
- } else if (s->samplerate && fi.samplerate != s->samplerate) {
- av_log(s->avctx, AV_LOG_WARNING, "sample rate changed from %d to %d\n",
- s->samplerate, fi.samplerate);
- }
s->samplerate = s->avctx->sample_rate = fi.samplerate;
if (!s->got_streaminfo) {
- allocate_buffers(s);
+ ret = allocate_buffers(s);
+ if (ret < 0)
+ return ret;
ff_flacdsp_init(&s->dsp, s->avctx->sample_fmt, s->bps);
s->got_streaminfo = 1;
dump_headers(s->avctx, (FLACStreaminfo *)s);
/* get output buffer */
s->frame.nb_samples = s->blocksize;
- if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+ if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
static av_cold int flac_decode_close(AVCodecContext *avctx)
{
FLACContext *s = avctx->priv_data;
- int i;
- for (i = 0; i < s->channels; i++) {
- av_freep(&s->decoded[i]);
- }
+ av_freep(&s->decoded_buffer);
return 0;
}
projects / ffmpeg / blobdiff