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[xcode] Support for ALAC encoded RSP/DAAP streaming

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Also changes WAV encoding to use source quality instead of fixed 44100/16/2.
Sets the default to WAV, since it has the best quality, and doesn't have the
delay that creating an MP4 container for ALAC currently has (TODO prepare
the headers to avoid the delay).

Ref issue #1182 and #1665
This commit is contained in:
ejurgensen
2023-12-05 21:47:44 +01:00
parent c30f44fd01
commit aed74fbb8a
7 changed files with 548 additions and 208 deletions
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23
src/transcode.h
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@@ -23,10 +23,14 @@ enum transcode_profile
XCODE_PCM32,
// Transcodes the best audio stream to MP3
XCODE_MP3,
// Transcodes the best audio stream to OPUS
// Transcodes the best audio stream to raw OPUS (no container)
XCODE_OPUS,
// Transcodes the best audio stream to ALAC
// Transcodes the best audio stream to raw ALAC (no container)
XCODE_ALAC,
// Transcodes the best audio stream to ALAC in a MP4 container
XCODE_MP4_ALAC,
// Produces just the header for a MP4 container with ALAC
XCODE_MP4_ALAC_HEADER,
// Transcodes the best audio stream from OGG
XCODE_OGG,
// Transcodes the best video stream to JPEG/PNG/VP8
@@ -79,6 +83,9 @@ transcode_decode_setup(enum transcode_profile profile, struct media_quality *qua
struct encode_ctx *
transcode_encode_setup(enum transcode_profile profile, struct media_quality *quality, struct decode_ctx *src_ctx, int width, int height);
struct encode_ctx *
transcode_encode_setup_with_io(enum transcode_profile profile, struct media_quality *quality, struct transcode_evbuf_io *evbuf_io, struct decode_ctx *src_ctx, int width, int height);
struct transcode_ctx *
transcode_setup(enum transcode_profile profile, struct media_quality *quality, enum data_kind data_kind, const char *path, uint32_t len_ms);
@@ -182,9 +189,15 @@ transcode_encode_query(struct encode_ctx *ctx, const char *query);
struct http_icy_metadata *
transcode_metadata(struct transcode_ctx *ctx, int *changed);
// When transcoding, we are in essence serving a different source file than the
// original to the client. So we can't serve some of the file metadata from the
// filescanner. This function creates strings to be used for override.
/* When transcoding, we are in essence serving a different source file than the
* original to the client. So we can't serve some of the file metadata from the
* filescanner. This function creates strings to be used for override.
*
* @out s Structure with (non-allocated) strings
* @in profile Transcoding profile
* @in q Transcoding quality
* @in len_ms Length of source track
*/
void
transcode_metadata_strings_set(struct transcode_metadata_string *s, enum transcode_profile profile, struct media_quality *q, uint32_t len_ms);