* 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
*/
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
-#include "libavcore/samplefmt.h"
+#include "libavutil/samplefmt.h"
#include "avcodec.h"
#include "audioconvert.h"
}
#endif
-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",
-};
-
-static 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;
+ case 1: return AV_CH_LAYOUT_MONO;
+ case 2: return AV_CH_LAYOUT_STEREO;
+ case 3: return AV_CH_LAYOUT_SURROUND;
+ case 4: return AV_CH_LAYOUT_QUAD;
+ case 5: return AV_CH_LAYOUT_5POINT0;
+ case 6: return AV_CH_LAYOUT_5POINT1;
+ case 8: return AV_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 },
- { "4.0", 4, CH_LAYOUT_4POINT0 },
- { "quad", 4, CH_LAYOUT_QUAD },
- { "5.0", 5, CH_LAYOUT_5POINT0 },
- { "5.0", 5, CH_LAYOUT_5POINT0_BACK },
- { "5.1", 6, CH_LAYOUT_5POINT1 },
- { "5.1", 6, CH_LAYOUT_5POINT1_BACK },
- { "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 }
-};
-
+#if FF_API_OLD_AUDIOCONVERT
int64_t avcodec_get_channel_layout(const char *name)
{
- int i = 0;
- do {
- if (!strcmp(channel_layout_map[i].name, name))
- return channel_layout_map[i].layout;
- i++;
- } while (channel_layout_map[i].name);
-
- return 0;
+ return av_get_channel_layout(name);
}
void avcodec_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout)
{
- int i;
-
- 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) {
- av_strlcpy(buf, channel_layout_map[i].name, buf_size);
- 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);
- }
+ av_get_channel_layout_string(buf, buf_size, nb_channels, channel_layout);
}
int avcodec_channel_layout_num_channels(int64_t channel_layout)
{
- int count;
- uint64_t x = channel_layout;
- for (count = 0; x; count++)
- x &= x-1; // unset lowest set bit
- return count;
+ return av_get_channel_layout_nb_channels(channel_layout);
}
+#endif
struct AVAudioConvert {
int in_channels, out_channels;
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 / (1<<31)))
- else CONV(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1<<31)))
+ 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))))
projects / ffmpeg / blobdiff