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Refactor transcode.c so it can actually transcode + use new capability to support mp3 streaming.

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Also includes the skeleton for perhaps supporting video in the future. Adds more fine-grained
ffmpeg/libav compability checks. Dependency on libavresample/libswresample exchanged with
dependency on libavfilter, which seems more versatile.
This commit is contained in:
ejurgensen
2015-10-09 23:58:27 +02:00
parent da3d32902e
commit 2a610812a5
16 changed files with 2180 additions and 810 deletions
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77
src/transcode.h
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@@ -2,34 +2,81 @@
#ifndef __TRANSCODE_H__
#define __TRANSCODE_H__
#ifdef HAVE_LIBEVENT2
# include <event2/buffer.h>
#else
# include <event.h>
#endif
#include <event2/buffer.h>
#include "db.h"
#include "http.h"
#define XCODE_WAVHEADER (1 << 14)
#define XCODE_HAS_VIDEO (1 << 15)
enum transcode_profile
{
// Transcodes the best available audio stream into PCM16 (does not add wav header)
XCODE_PCM16_NOHEADER = 1,
// Transcodes the best available audio stream into PCM16 (with wav header)
XCODE_PCM16_HEADER = XCODE_WAVHEADER | 2,
// Transcodes the best available audio stream into MP3
XCODE_MP3 = 3,
// Transcodes video + audio + subtitle streams (not tested - for future use)
XCODE_H264_AAC = XCODE_HAS_VIDEO | 4,
};
struct decode_ctx;
struct encode_ctx;
struct transcode_ctx;
struct decoded_frame;
int
transcode(struct transcode_ctx *ctx, struct evbuffer *evbuf, int wanted, int *icy_timer);
// Setting up
struct decode_ctx *
transcode_decode_setup(struct media_file_info *mfi, int decode_video);
int
transcode_seek(struct transcode_ctx *ctx, int ms);
struct encode_ctx *
transcode_encode_setup(struct decode_ctx *src_ctx, enum transcode_profile profile, off_t *est_size);
int
transcode_setup(struct transcode_ctx **nctx, struct media_file_info *mfi, off_t *est_size, int wavhdr);
struct transcode_ctx *
transcode_setup(struct media_file_info *mfi, enum transcode_profile profile, off_t *est_size);
void
transcode_cleanup(struct transcode_ctx *ctx);
struct decode_ctx *
transcode_decode_setup_raw(void);
int
transcode_needed(const char *user_agent, const char *client_codecs, char *file_codectype);
// Cleaning up
void
transcode_metadata(struct transcode_ctx *ctx, struct http_icy_metadata **metadata, int *changed);
transcode_decode_cleanup(struct decode_ctx *ctx);
void
transcode_metadata_artwork_url(struct transcode_ctx *ctx, char **artwork_url);
transcode_encode_cleanup(struct encode_ctx *ctx);
void
transcode_cleanup(struct transcode_ctx *ctx);
void
transcode_decoded_free(struct decoded_frame *decoded);
// Transcoding
struct decoded_frame *
transcode_decode(struct decode_ctx *ctx);
int
transcode_encode(struct evbuffer *evbuf, struct decoded_frame *decoded, struct encode_ctx *ctx);
int
transcode(struct transcode_ctx *ctx, struct evbuffer *evbuf, int wanted, int *icy_timer);
struct decoded_frame *
transcode_raw2frame(uint8_t *data, size_t size);
// Seeking
int
transcode_seek(struct transcode_ctx *ctx, int ms);
// Metadata
struct http_icy_metadata *
transcode_metadata(struct transcode_ctx *ctx, int *changed);
char *
transcode_metadata_artwork_url(struct transcode_ctx *ctx);
#endif /* !__TRANSCODE_H__ */