* audio conversion
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
- * 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
*/
/**
- * @file audioconvert.c
+ * @file
* audio conversion
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "libavutil/avstring.h"
+#include "libavutil/common.h"
+#include "libavutil/libm.h"
+#include "libavutil/samplefmt.h"
#include "avcodec.h"
#include "audioconvert.h"
-typedef struct SampleFmtInfo {
- const char *name;
- int bits;
-} SampleFmtInfo;
-
-/** this table gives more information about formats */
-static const SampleFmtInfo sample_fmt_info[SAMPLE_FMT_NB] = {
- [SAMPLE_FMT_U8] = { .name = "u8", .bits = 8 },
- [SAMPLE_FMT_S16] = { .name = "s16", .bits = 16 },
- [SAMPLE_FMT_S32] = { .name = "s32", .bits = 32 },
- [SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32 },
- [SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64 },
-};
-
-const char *avcodec_get_sample_fmt_name(int sample_fmt)
-{
- if (sample_fmt < 0 || sample_fmt >= SAMPLE_FMT_NB)
- return NULL;
- return sample_fmt_info[sample_fmt].name;
-}
-
-enum SampleFormat avcodec_get_sample_fmt(const char* name)
-{
- int i;
-
- for (i=0; i < SAMPLE_FMT_NB; i++)
- if (!strcmp(sample_fmt_info[i].name, name))
- return i;
- return SAMPLE_FMT_NONE;
-}
-
-void avcodec_sample_fmt_string (char *buf, int buf_size, int sample_fmt)
-{
- /* print header */
- if (sample_fmt < 0)
- snprintf (buf, buf_size, "name " " depth");
- else if (sample_fmt < SAMPLE_FMT_NB) {
- SampleFmtInfo info= sample_fmt_info[sample_fmt];
- snprintf (buf, buf_size, "%-6s" " %2d ", info.name, info.bits);
- }
-}
-
-static const char* const channel_names[]={
- "FL", "FR", "FC", "LFE", "BL", "BR", "FLC", "FRC",
- "BC", "SL", "SR", "TC", "TFL", "TFC", "TFR", "TBL",
- "TBC", "TBR",
- [29] = "DL",
- [30] = "DR",
-};
-
-const char *get_channel_name(int channel_id)
-{
- if (channel_id<0 || channel_id>=FF_ARRAY_ELEMS(channel_names))
- return NULL;
- return channel_names[channel_id];
-}
-
-int64_t avcodec_guess_channel_layout(int nb_channels, enum CodecID codec_id, const char *fmt_name)
-{
- switch(nb_channels) {
- case 1: return CH_LAYOUT_MONO;
- case 2: return CH_LAYOUT_STEREO;
- case 3: return CH_LAYOUT_SURROUND;
- case 4: return CH_LAYOUT_QUAD;
- case 5: return CH_LAYOUT_5POINT0;
- case 6: return CH_LAYOUT_5POINT1;
- case 8: return CH_LAYOUT_7POINT1;
- default: return 0;
- }
-}
-
-static const struct {
- const char *name;
- int nb_channels;
- int64_t layout;
-} channel_layout_map[] = {
- { "mono", 1, CH_LAYOUT_MONO },
- { "stereo", 2, CH_LAYOUT_STEREO },
- { "surround", 3, CH_LAYOUT_SURROUND },
- { "quad", 4, CH_LAYOUT_QUAD },
- { "5.0", 5, CH_LAYOUT_5POINT0 },
- { "5.1", 6, CH_LAYOUT_5POINT1 },
- { "5.1+downmix", 8, CH_LAYOUT_5POINT1|CH_LAYOUT_STEREO_DOWNMIX, },
- { "7.1", 8, CH_LAYOUT_7POINT1 },
- { "7.1(wide)", 8, CH_LAYOUT_7POINT1_WIDE },
- { "7.1+downmix", 10, CH_LAYOUT_7POINT1|CH_LAYOUT_STEREO_DOWNMIX, },
- { 0 }
-};
-
-void avcodec_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout)
-{
- int i;
-
- if (channel_layout==0)
- channel_layout = avcodec_guess_channel_layout(nb_channels, CODEC_ID_NONE, NULL);
-
- for (i=0; channel_layout_map[i].name; i++)
- if (nb_channels == channel_layout_map[i].nb_channels &&
- channel_layout == channel_layout_map[i].layout) {
- snprintf(buf, buf_size, channel_layout_map[i].name);
- return;
- }
-
- snprintf(buf, buf_size, "%d channels", nb_channels);
- if (channel_layout) {
- int i,ch;
- av_strlcat(buf, " (", buf_size);
- for(i=0,ch=0; i<64; i++) {
- if ((channel_layout & (1L<<i))) {
- const char *name = get_channel_name(i);
- if (name) {
- if (ch>0) av_strlcat(buf, "|", buf_size);
- av_strlcat(buf, name, buf_size);
- }
- ch++;
- }
- }
- av_strlcat(buf, ")", buf_size);
- }
-}
-
struct AVAudioConvert {
int in_channels, out_channels;
int fmt_pair;
};
-AVAudioConvert *av_audio_convert_alloc(enum SampleFormat out_fmt, int out_channels,
- enum SampleFormat in_fmt, int in_channels,
+AVAudioConvert *av_audio_convert_alloc(enum AVSampleFormat out_fmt, int out_channels,
+ enum AVSampleFormat in_fmt, int in_channels,
const float *matrix, int flags)
{
AVAudioConvert *ctx;
return NULL;
ctx->in_channels = in_channels;
ctx->out_channels = out_channels;
- ctx->fmt_pair = out_fmt + SAMPLE_FMT_NB*in_fmt;
+ ctx->fmt_pair = out_fmt + AV_SAMPLE_FMT_NB*in_fmt;
return ctx;
}
continue;
#define CONV(ofmt, otype, ifmt, expr)\
-if(ctx->fmt_pair == ofmt + SAMPLE_FMT_NB*ifmt){\
+if(ctx->fmt_pair == ofmt + AV_SAMPLE_FMT_NB*ifmt){\
do{\
*(otype*)po = expr; pi += is; po += os;\
}while(po < end);\
}
//FIXME put things below under ifdefs so we do not waste space for cases no codec will need
-//FIXME rounding and clipping ?
-
- CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_U8 , *(const uint8_t*)pi)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<8)
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<24)
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_S16, (*(const int16_t*)pi>>8) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_S16, *(const int16_t*)pi)
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_S16, *(const int16_t*)pi<<16)
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_S32, (*(const int32_t*)pi>>24) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_S32, *(const int32_t*)pi>>16)
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_S32, *(const int32_t*)pi)
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1<<31)))
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1<<31)))
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_FLT, lrintf(*(const float*)pi * (1<<7)) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_FLT, lrintf(*(const float*)pi * (1<<15)))
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_FLT, lrintf(*(const float*)pi * (1<<31)))
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_FLT, *(const float*)pi)
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_FLT, *(const float*)pi)
- else CONV(SAMPLE_FMT_U8 , uint8_t, SAMPLE_FMT_DBL, lrint(*(const double*)pi * (1<<7)) + 0x80)
- else CONV(SAMPLE_FMT_S16, int16_t, SAMPLE_FMT_DBL, lrint(*(const double*)pi * (1<<15)))
- else CONV(SAMPLE_FMT_S32, int32_t, SAMPLE_FMT_DBL, lrint(*(const double*)pi * (1<<31)))
- else CONV(SAMPLE_FMT_FLT, float , SAMPLE_FMT_DBL, *(const double*)pi)
- else CONV(SAMPLE_FMT_DBL, double , SAMPLE_FMT_DBL, *(const double*)pi)
+//FIXME rounding ?
+
+ CONV(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_U8 , *(const uint8_t*)pi)
+ else CONV(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<8)
+ else CONV(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<24)
+ else CONV(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
+ else CONV(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
+ else CONV(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_S16, (*(const int16_t*)pi>>8) + 0x80)
+ else CONV(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S16, *(const int16_t*)pi)
+ else CONV(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16, *(const int16_t*)pi<<16)
+ else CONV(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
+ else CONV(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
+ else CONV(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_S32, (*(const int32_t*)pi>>24) + 0x80)
+ else CONV(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S32, *(const int32_t*)pi>>16)
+ else CONV(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S32, *(const int32_t*)pi)
+ else CONV(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1U<<31)))
+ else CONV(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1U<<31)))
+ else CONV(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8( lrintf(*(const float*)pi * (1<<7)) + 0x80))
+ else CONV(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16( lrintf(*(const float*)pi * (1<<15))))
+ else CONV(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float*)pi * (1U<<31))))
+ else CONV(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_FLT, *(const float*)pi)
+ else CONV(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_FLT, *(const float*)pi)
+ else CONV(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8( lrint(*(const double*)pi * (1<<7)) + 0x80))
+ else CONV(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16( lrint(*(const double*)pi * (1<<15))))
+ else CONV(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double*)pi * (1U<<31))))
+ else CONV(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_DBL, *(const double*)pi)
+ else CONV(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_DBL, *(const double*)pi)
else return -1;
}
return 0;
projects / ffmpeg / blobdiff