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[xcode] A bit of refactoring

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This commit is contained in:
ejurgensen 2022-10-09 23:46:39 +02:00
parent e437e41870
commit 4ff850cd3d
1 changed files with 68 additions and 53 deletions
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117
src/transcode.c
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@ -52,6 +52,8 @@
#define READ_TIMEOUT 30000000 #define READ_TIMEOUT 30000000
// Buffer size for reading/writing input and output evbuffers // Buffer size for reading/writing input and output evbuffers
#define AVIO_BUFFER_SIZE 4096 #define AVIO_BUFFER_SIZE 4096
// Size of the wav header that iTunes needs
#define WAV_HEADER_LEN 44
static const char *default_codecs = "mpeg,wav"; static const char *default_codecs = "mpeg,wav";
static const char *roku_codecs = "mpeg,mp4a,wma,alac,wav"; static const char *roku_codecs = "mpeg,mp4a,wma,alac,wav";
@ -82,11 +84,11 @@ struct settings_ctx
AVChannelLayout channel_layout; AVChannelLayout channel_layout;
#else #else
uint64_t channel_layout; uint64_t channel_layout;
#endif
int channels; int channels;
#endif
int bit_rate; int bit_rate;
enum AVSampleFormat sample_format; enum AVSampleFormat sample_format;
bool wavheader; bool wav_header;
bool icy; bool icy;
// Video settings // Video settings
@ -180,7 +182,7 @@ struct encode_ctx
uint32_t icy_hash; uint32_t icy_hash;
// WAV header // WAV header
uint8_t header[44]; uint8_t wav_header[WAV_HEADER_LEN];
}; };
enum probe_type enum probe_type
@ -212,7 +214,7 @@ init_settings(struct settings_ctx *settings, enum transcode_profile profile, str
break; break;
case XCODE_PCM16_HEADER: case XCODE_PCM16_HEADER:
settings->wavheader = 1; settings->wav_header = 1;
case XCODE_PCM16: case XCODE_PCM16:
settings->encode_audio = 1; settings->encode_audio = 1;
settings->format = "s16le"; settings->format = "s16le";
@ -315,11 +317,11 @@ init_settings(struct settings_ctx *settings, enum transcode_profile profile, str
if (quality && quality->channels) if (quality && quality->channels)
{ {
settings->channels = quality->channels;
#ifdef HAVE_FFMPEG_CH_LAYOUT #ifdef HAVE_FFMPEG_CH_LAYOUT
av_channel_layout_default(&settings->channel_layout, quality->channels); av_channel_layout_default(&settings->channel_layout, quality->channels);
#else #else
settings->channel_layout = av_get_default_channel_layout(quality->channels); settings->channel_layout = av_get_default_channel_layout(quality->channels);
settings->channels = quality->channels;
#endif #endif
} }
@ -401,36 +403,34 @@ add_le32(uint8_t *dst, uint32_t val)
dst[3] = (val >> 24) & 0xff; dst[3] = (val >> 24) & 0xff;
} }
/*
* header must have size WAV_HEADER_LEN (44 bytes)
*/
static void static void
make_wav_header(struct encode_ctx *ctx, struct decode_ctx *src_ctx, off_t *est_size) make_wav_header(uint8_t *header, off_t *est_size, int sample_rate, int bps, int channels, int duration)
{ {
uint32_t wav_len; uint32_t wav_len;
int duration;
int bps;
if (src_ctx->duration) if (duration == 0)
duration = src_ctx->duration;
else
duration = 3 * 60 * 1000; /* 3 minutes, in ms */ duration = 3 * 60 * 1000; /* 3 minutes, in ms */
bps = av_get_bytes_per_sample(ctx->settings.sample_format); wav_len = channels * bps * sample_rate * (duration / 1000);
wav_len = ctx->settings.channels * bps * ctx->settings.sample_rate * (duration / 1000);
if (est_size) if (est_size)
*est_size = wav_len + sizeof(ctx->header); *est_size = wav_len + WAV_HEADER_LEN;
memcpy(ctx->header, "RIFF", 4); memcpy(header, "RIFF", 4);
add_le32(ctx->header + 4, 36 + wav_len); add_le32(header + 4, 36 + wav_len);
memcpy(ctx->header + 8, "WAVEfmt ", 8); memcpy(header + 8, "WAVEfmt ", 8);
add_le32(ctx->header + 16, 16); add_le32(header + 16, 16);
add_le16(ctx->header + 20, 1); add_le16(header + 20, 1);
add_le16(ctx->header + 22, ctx->settings.channels); /* channels */ add_le16(header + 22, channels); /* channels */
add_le32(ctx->header + 24, ctx->settings.sample_rate); /* samplerate */ add_le32(header + 24, sample_rate); /* samplerate */
add_le32(ctx->header + 28, ctx->settings.sample_rate * ctx->settings.channels * bps); /* byte rate */ add_le32(header + 28, sample_rate * channels * bps); /* byte rate */
add_le16(ctx->header + 32, ctx->settings.channels * bps); /* block align */ add_le16(header + 32, channels * bps); /* block align */
add_le16(ctx->header + 34, 8 * bps); /* bits per sample */ add_le16(header + 34, 8 * bps); /* bits per sample */
memcpy(ctx->header + 36, "data", 4); memcpy(header + 36, "data", 4);
add_le32(ctx->header + 40, wav_len); add_le32(header + 40, wav_len);
} }
/* /*
@ -1184,9 +1184,9 @@ open_output(struct encode_ctx *ctx, struct decode_ctx *src_ctx)
goto out_free_streams; goto out_free_streams;
} }
if (ctx->settings.wavheader) if (ctx->settings.wav_header)
{ {
evbuffer_add(ctx->obuf, ctx->header, sizeof(ctx->header)); evbuffer_add(ctx->obuf, ctx->wav_header, sizeof(ctx->wav_header));
} }
return 0; return 0;
@ -1248,8 +1248,10 @@ open_filter(struct stream_ctx *out_stream, struct stream_ctx *in_stream)
} }
#ifdef HAVE_FFMPEG_CH_LAYOUT #ifdef HAVE_FFMPEG_CH_LAYOUT
if (!av_channel_layout_check(&in_stream->codec->ch_layout)) // Some AIFF files only have a channel number, not a layout
if (in_stream->codec->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
av_channel_layout_default(&in_stream->codec->ch_layout, in_stream->codec->ch_layout.nb_channels); av_channel_layout_default(&in_stream->codec->ch_layout, in_stream->codec->ch_layout.nb_channels);
av_channel_layout_describe(&in_stream->codec->ch_layout, buf, sizeof(buf)); av_channel_layout_describe(&in_stream->codec->ch_layout, buf, sizeof(buf));
snprintf(args, sizeof(args), snprintf(args, sizeof(args),
@ -1277,10 +1279,10 @@ open_filter(struct stream_ctx *out_stream, struct stream_ctx *in_stream)
DPRINTF(E_DBG, L_XCODE, "Created 'in' filter: %s\n", args); DPRINTF(E_DBG, L_XCODE, "Created 'in' filter: %s\n", args);
// For some AIFF files, ffmpeg (3.4.6) will not give us a channel_layout (bug in ffmpeg?)
#ifdef HAVE_FFMPEG_CH_LAYOUT #ifdef HAVE_FFMPEG_CH_LAYOUT
if (!av_channel_layout_check(&out_stream->codec->ch_layout)) if (out_stream->codec->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
av_channel_layout_default(&out_stream->codec->ch_layout, out_stream->codec->ch_layout.nb_channels); av_channel_layout_default(&out_stream->codec->ch_layout, out_stream->codec->ch_layout.nb_channels);
av_channel_layout_describe(&out_stream->codec->ch_layout, buf, sizeof(buf)); av_channel_layout_describe(&out_stream->codec->ch_layout, buf, sizeof(buf));
snprintf(args, sizeof(args), snprintf(args, sizeof(args),
@ -1288,6 +1290,7 @@ open_filter(struct stream_ctx *out_stream, struct stream_ctx *in_stream)
av_get_sample_fmt_name(out_stream->codec->sample_fmt), out_stream->codec->sample_rate, av_get_sample_fmt_name(out_stream->codec->sample_fmt), out_stream->codec->sample_rate,
buf); buf);
#else #else
// For some AIFF files, ffmpeg (3.4.6) will not give us a channel_layout (bug in ffmpeg?)
if (!out_stream->codec->channel_layout) if (!out_stream->codec->channel_layout)
out_stream->codec->channel_layout = av_get_default_channel_layout(out_stream->codec->channels); out_stream->codec->channel_layout = av_get_default_channel_layout(out_stream->codec->channels);
@ -1487,7 +1490,9 @@ struct encode_ctx *
transcode_encode_setup(enum transcode_profile profile, struct media_quality *quality, struct decode_ctx *src_ctx, off_t *est_size, int width, int height) transcode_encode_setup(enum transcode_profile profile, struct media_quality *quality, struct decode_ctx *src_ctx, off_t *est_size, int width, int height)
{ {
struct encode_ctx *ctx; struct encode_ctx *ctx;
int bps; int src_bps;
int dst_bps;
int channels;
CHECK_NULL(L_XCODE, ctx = calloc(1, sizeof(struct encode_ctx))); CHECK_NULL(L_XCODE, ctx = calloc(1, sizeof(struct encode_ctx)));
CHECK_NULL(L_XCODE, ctx->filt_frame = av_frame_alloc()); CHECK_NULL(L_XCODE, ctx->filt_frame = av_frame_alloc());
@ -1505,11 +1510,11 @@ transcode_encode_setup(enum transcode_profile profile, struct media_quality *qua
ctx->settings.sample_rate = src_ctx->audio_stream.codec->sample_rate; ctx->settings.sample_rate = src_ctx->audio_stream.codec->sample_rate;
} }
// Caller did not specify a sample format -> use same as source // Caller did not specify a sample format -> determine from source
if (!ctx->settings.sample_format && ctx->settings.encode_audio) if (!ctx->settings.sample_format && ctx->settings.encode_audio)
{ {
bps = av_get_bytes_per_sample(src_ctx->audio_stream.codec->sample_fmt); src_bps = av_get_bytes_per_sample(src_ctx->audio_stream.codec->sample_fmt);
if (bps == 4) if (src_bps == 4)
{ {
ctx->settings.sample_format = AV_SAMPLE_FMT_S32; ctx->settings.sample_format = AV_SAMPLE_FMT_S32;
ctx->settings.audio_codec = AV_CODEC_ID_PCM_S32LE; ctx->settings.audio_codec = AV_CODEC_ID_PCM_S32LE;
@ -1523,20 +1528,36 @@ transcode_encode_setup(enum transcode_profile profile, struct media_quality *qua
} }
} }
// Caller did not specify channels -> use same as source
if (!ctx->settings.channels && ctx->settings.encode_audio)
{
#ifdef HAVE_FFMPEG_CH_LAYOUT #ifdef HAVE_FFMPEG_CH_LAYOUT
ctx->settings.channels = src_ctx->audio_stream.codec->ch_layout.nb_channels; // Caller did not specify channels -> use same as source
if (!av_channel_layout_check(&ctx->settings.channel_layout) && ctx->settings.encode_audio)
{
av_channel_layout_copy(&ctx->settings.channel_layout, &src_ctx->audio_stream.codec->ch_layout); av_channel_layout_copy(&ctx->settings.channel_layout, &src_ctx->audio_stream.codec->ch_layout);
#else
ctx->settings.channels = src_ctx->audio_stream.codec->channels;
ctx->settings.channel_layout = src_ctx->audio_stream.codec->channel_layout;
#endif
} }
if (ctx->settings.wavheader) channels = ctx->settings.channel_layout.nb_channels;
make_wav_header(ctx, src_ctx, est_size); #else
// Caller did not specify channels -> use same as source
if (ctx->settings.channels == 0 && ctx->settings.encode_audio)
{
ctx->settings.channels = src_ctx->audio_stream.codec->channels;
ctx->settings.channel_layout = src_ctx->audio_stream.codec->channel_layout;
}
channels = ctx->settings.channels;
#endif
if (ctx->settings.wav_header)
{
dst_bps = av_get_bytes_per_sample(ctx->settings.sample_format);
make_wav_header(ctx->wav_header, est_size, ctx->settings.sample_rate, dst_bps, channels, src_ctx->duration);
}
if (ctx->settings.icy && src_ctx->data_kind == DATA_KIND_HTTP)
{
dst_bps = av_get_bytes_per_sample(ctx->settings.sample_format);
ctx->icy_interval = METADATA_ICY_INTERVAL * channels * dst_bps * ctx->settings.sample_rate;
}
if (open_output(ctx, src_ctx) < 0) if (open_output(ctx, src_ctx) < 0)
goto fail_free; goto fail_free;
@ -1544,12 +1565,6 @@ transcode_encode_setup(enum transcode_profile profile, struct media_quality *qua
if (open_filters(ctx, src_ctx) < 0) if (open_filters(ctx, src_ctx) < 0)
goto fail_close; goto fail_close;
if (ctx->settings.icy && src_ctx->data_kind == DATA_KIND_HTTP)
{
bps = av_get_bytes_per_sample(ctx->settings.sample_format);
ctx->icy_interval = METADATA_ICY_INTERVAL * ctx->settings.channels * bps * ctx->settings.sample_rate;
}
return ctx; return ctx;
fail_close: fail_close: