* Copyright (c) 2007 Luca Abeni ( lucabe72 email it )
* Copyright (c) 2007 Benoit Fouet ( benoit fouet free fr )
*
- * 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 libavdevice/alsa-audio-common.c
+ * @file
* ALSA input and output: common code
* @author Luca Abeni ( lucabe72 email it )
* @author Benoit Fouet ( benoit fouet free fr )
#include <alsa/asoundlib.h>
#include "libavformat/avformat.h"
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
#include "alsa-audio.h"
static av_cold snd_pcm_format_t codec_id_to_pcm_format(int codec_id)
{
switch(codec_id) {
- case CODEC_ID_PCM_S16LE: return SND_PCM_FORMAT_S16_LE;
- case CODEC_ID_PCM_S16BE: return SND_PCM_FORMAT_S16_BE;
- case CODEC_ID_PCM_S8: return SND_PCM_FORMAT_S8;
+ case AV_CODEC_ID_PCM_F64LE: return SND_PCM_FORMAT_FLOAT64_LE;
+ case AV_CODEC_ID_PCM_F64BE: return SND_PCM_FORMAT_FLOAT64_BE;
+ case AV_CODEC_ID_PCM_F32LE: return SND_PCM_FORMAT_FLOAT_LE;
+ case AV_CODEC_ID_PCM_F32BE: return SND_PCM_FORMAT_FLOAT_BE;
+ case AV_CODEC_ID_PCM_S32LE: return SND_PCM_FORMAT_S32_LE;
+ case AV_CODEC_ID_PCM_S32BE: return SND_PCM_FORMAT_S32_BE;
+ case AV_CODEC_ID_PCM_U32LE: return SND_PCM_FORMAT_U32_LE;
+ case AV_CODEC_ID_PCM_U32BE: return SND_PCM_FORMAT_U32_BE;
+ case AV_CODEC_ID_PCM_S24LE: return SND_PCM_FORMAT_S24_3LE;
+ case AV_CODEC_ID_PCM_S24BE: return SND_PCM_FORMAT_S24_3BE;
+ case AV_CODEC_ID_PCM_U24LE: return SND_PCM_FORMAT_U24_3LE;
+ case AV_CODEC_ID_PCM_U24BE: return SND_PCM_FORMAT_U24_3BE;
+ case AV_CODEC_ID_PCM_S16LE: return SND_PCM_FORMAT_S16_LE;
+ case AV_CODEC_ID_PCM_S16BE: return SND_PCM_FORMAT_S16_BE;
+ case AV_CODEC_ID_PCM_U16LE: return SND_PCM_FORMAT_U16_LE;
+ case AV_CODEC_ID_PCM_U16BE: return SND_PCM_FORMAT_U16_BE;
+ case AV_CODEC_ID_PCM_S8: return SND_PCM_FORMAT_S8;
+ case AV_CODEC_ID_PCM_U8: return SND_PCM_FORMAT_U8;
+ case AV_CODEC_ID_PCM_MULAW: return SND_PCM_FORMAT_MU_LAW;
+ case AV_CODEC_ID_PCM_ALAW: return SND_PCM_FORMAT_A_LAW;
default: return SND_PCM_FORMAT_UNKNOWN;
}
}
+#define REORDER_OUT_50(NAME, TYPE) \
+static void alsa_reorder_ ## NAME ## _out_50(const void *in_v, void *out_v, int n) \
+{ \
+ const TYPE *in = in_v; \
+ TYPE *out = out_v; \
+\
+ while (n-- > 0) { \
+ out[0] = in[0]; \
+ out[1] = in[1]; \
+ out[2] = in[3]; \
+ out[3] = in[4]; \
+ out[4] = in[2]; \
+ in += 5; \
+ out += 5; \
+ } \
+}
+
+#define REORDER_OUT_51(NAME, TYPE) \
+static void alsa_reorder_ ## NAME ## _out_51(const void *in_v, void *out_v, int n) \
+{ \
+ const TYPE *in = in_v; \
+ TYPE *out = out_v; \
+\
+ while (n-- > 0) { \
+ out[0] = in[0]; \
+ out[1] = in[1]; \
+ out[2] = in[4]; \
+ out[3] = in[5]; \
+ out[4] = in[2]; \
+ out[5] = in[3]; \
+ in += 6; \
+ out += 6; \
+ } \
+}
+
+#define REORDER_OUT_71(NAME, TYPE) \
+static void alsa_reorder_ ## NAME ## _out_71(const void *in_v, void *out_v, int n) \
+{ \
+ const TYPE *in = in_v; \
+ TYPE *out = out_v; \
+\
+ while (n-- > 0) { \
+ out[0] = in[0]; \
+ out[1] = in[1]; \
+ out[2] = in[4]; \
+ out[3] = in[5]; \
+ out[4] = in[2]; \
+ out[5] = in[3]; \
+ out[6] = in[6]; \
+ out[7] = in[7]; \
+ in += 8; \
+ out += 8; \
+ } \
+}
+
+REORDER_OUT_50(int8, int8_t)
+REORDER_OUT_51(int8, int8_t)
+REORDER_OUT_71(int8, int8_t)
+REORDER_OUT_50(int16, int16_t)
+REORDER_OUT_51(int16, int16_t)
+REORDER_OUT_71(int16, int16_t)
+REORDER_OUT_50(int32, int32_t)
+REORDER_OUT_51(int32, int32_t)
+REORDER_OUT_71(int32, int32_t)
+REORDER_OUT_50(f32, float)
+REORDER_OUT_51(f32, float)
+REORDER_OUT_71(f32, float)
+
+#define FORMAT_I8 0
+#define FORMAT_I16 1
+#define FORMAT_I32 2
+#define FORMAT_F32 3
+
+#define PICK_REORDER(layout)\
+switch(format) {\
+ case FORMAT_I8: s->reorder_func = alsa_reorder_int8_out_ ##layout; break;\
+ case FORMAT_I16: s->reorder_func = alsa_reorder_int16_out_ ##layout; break;\
+ case FORMAT_I32: s->reorder_func = alsa_reorder_int32_out_ ##layout; break;\
+ case FORMAT_F32: s->reorder_func = alsa_reorder_f32_out_ ##layout; break;\
+}
+
+static av_cold int find_reorder_func(AlsaData *s, int codec_id, uint64_t layout, int out)
+{
+ int format;
+
+ /* reordering input is not currently supported */
+ if (!out)
+ return AVERROR(ENOSYS);
+
+ /* reordering is not needed for QUAD or 2_2 layout */
+ if (layout == AV_CH_LAYOUT_QUAD || layout == AV_CH_LAYOUT_2_2)
+ return 0;
+
+ switch (codec_id) {
+ case AV_CODEC_ID_PCM_S8:
+ case AV_CODEC_ID_PCM_U8:
+ case AV_CODEC_ID_PCM_ALAW:
+ case AV_CODEC_ID_PCM_MULAW: format = FORMAT_I8; break;
+ case AV_CODEC_ID_PCM_S16LE:
+ case AV_CODEC_ID_PCM_S16BE:
+ case AV_CODEC_ID_PCM_U16LE:
+ case AV_CODEC_ID_PCM_U16BE: format = FORMAT_I16; break;
+ case AV_CODEC_ID_PCM_S32LE:
+ case AV_CODEC_ID_PCM_S32BE:
+ case AV_CODEC_ID_PCM_U32LE:
+ case AV_CODEC_ID_PCM_U32BE: format = FORMAT_I32; break;
+ case AV_CODEC_ID_PCM_F32LE:
+ case AV_CODEC_ID_PCM_F32BE: format = FORMAT_F32; break;
+ default: return AVERROR(ENOSYS);
+ }
+
+ if (layout == AV_CH_LAYOUT_5POINT0_BACK || layout == AV_CH_LAYOUT_5POINT0)
+ PICK_REORDER(50)
+ else if (layout == AV_CH_LAYOUT_5POINT1_BACK || layout == AV_CH_LAYOUT_5POINT1)
+ PICK_REORDER(51)
+ else if (layout == AV_CH_LAYOUT_7POINT1)
+ PICK_REORDER(71)
+
+ return s->reorder_func ? 0 : AVERROR(ENOSYS);
+}
+
av_cold int ff_alsa_open(AVFormatContext *ctx, snd_pcm_stream_t mode,
unsigned int *sample_rate,
- int channels, enum CodecID *codec_id)
+ int channels, enum AVCodecID *codec_id)
{
AlsaData *s = ctx->priv_data;
const char *audio_device;
snd_pcm_t *h;
snd_pcm_hw_params_t *hw_params;
snd_pcm_uframes_t buffer_size, period_size;
+ uint64_t layout = ctx->streams[0]->codec->channel_layout;
if (ctx->filename[0] == 0) audio_device = "default";
else audio_device = ctx->filename;
- if (*codec_id == CODEC_ID_NONE)
+ if (*codec_id == AV_CODEC_ID_NONE)
*codec_id = DEFAULT_CODEC_ID;
format = codec_id_to_pcm_format(*codec_id);
if (format == SND_PCM_FORMAT_UNKNOWN) {
}
snd_pcm_hw_params_get_buffer_size_max(hw_params, &buffer_size);
+ buffer_size = FFMIN(buffer_size, ALSA_BUFFER_SIZE_MAX);
/* TODO: maybe use ctx->max_picture_buffer somehow */
res = snd_pcm_hw_params_set_buffer_size_near(h, hw_params, &buffer_size);
if (res < 0) {
}
snd_pcm_hw_params_get_period_size_min(hw_params, &period_size, NULL);
+ if (!period_size)
+ period_size = buffer_size / 4;
res = snd_pcm_hw_params_set_period_size_near(h, hw_params, &period_size, NULL);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "cannot set ALSA period size (%s)\n",
snd_pcm_hw_params_free(hw_params);
+ if (channels > 2 && layout) {
+ if (find_reorder_func(s, *codec_id, layout, mode == SND_PCM_STREAM_PLAYBACK) < 0) {
+ char name[128];
+ av_get_channel_layout_string(name, sizeof(name), channels, layout);
+ av_log(ctx, AV_LOG_WARNING, "ALSA channel layout unknown or unimplemented for %s %s.\n",
+ name, mode == SND_PCM_STREAM_PLAYBACK ? "playback" : "capture");
+ }
+ if (s->reorder_func) {
+ s->reorder_buf_size = buffer_size;
+ s->reorder_buf = av_malloc(s->reorder_buf_size * s->frame_size);
+ if (!s->reorder_buf)
+ goto fail1;
+ }
+ }
+
s->h = h;
return 0;
{
AlsaData *s = s1->priv_data;
+ av_freep(&s->reorder_buf);
snd_pcm_close(s->h);
return 0;
}
}
return err;
}
+
+int ff_alsa_extend_reorder_buf(AlsaData *s, int min_size)
+{
+ int size = s->reorder_buf_size;
+ void *r;
+
+ av_assert0(size != 0);
+ while (size < min_size)
+ size *= 2;
+ r = av_realloc(s->reorder_buf, size * s->frame_size);
+ if (!r)
+ return AVERROR(ENOMEM);
+ s->reorder_buf = r;
+ s->reorder_buf_size = size;
+ return 0;
+}
projects / ffmpeg / blobdiff