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avformat/avio: Constify data pointees of write callbacks

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They are currently non-const for reasons unknown, although
avio_write() accepts a const buffer.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-06 20:30:08 +02:00
parent e8704a8f60
commit 2a68d945cd
10 changed files with 71 additions and 1 deletions
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4
doc/APIchanges
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@ -2,6 +2,10 @@ The last version increases of all libraries were on 2023-02-09
API changes, most recent first:
2023-09-07 - xxxxxxxxxx - lavf 60.12.100 - avio.h
Constify the buffer pointees in the write_packet and write_data_type
callbacks of AVIOContext on the next major bump.
2023-09-07 - xxxxxxxxxx - lavc 60.26.100 - defs.h
Add AV_PROFILE_* and AV_LEVEL_* replacements in defs.h for the
defines from avcodec.h. The latter are deprecated.

4
libavformat/avio.c
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@ -408,7 +408,11 @@ int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
return retry_transfer_wrapper(h, buf, size, size, h->prot->url_read);
}
#if FF_API_AVIO_WRITE_NONCONST
int ffurl_write2(void *urlcontext, uint8_t *buf, int size)
#else
int ffurl_write2(void *urlcontext, const uint8_t *buf, int size)
#endif
{
URLContext *h = urlcontext;

13
libavformat/avio.h
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@ -238,7 +238,11 @@ typedef struct AVIOContext {
void *opaque; /**< A private pointer, passed to the read/write/seek/...
functions. */
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);
#if FF_API_AVIO_WRITE_NONCONST
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
#else
int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size);
#endif
int64_t (*seek)(void *opaque, int64_t offset, int whence);
int64_t pos; /**< position in the file of the current buffer */
int eof_reached; /**< true if was unable to read due to error or eof */
@ -286,8 +290,13 @@ typedef struct AVIOContext {
/**
* A callback that is used instead of write_packet.
*/
#if FF_API_AVIO_WRITE_NONCONST
int (*write_data_type)(void *opaque, uint8_t *buf, int buf_size,
enum AVIODataMarkerType type, int64_t time);
#else
int (*write_data_type)(void *opaque, const uint8_t *buf, int buf_size,
enum AVIODataMarkerType type, int64_t time);
#endif
/**
* If set, don't call write_data_type separately for AVIO_DATA_MARKER_BOUNDARY_POINT,
* but ignore them and treat them as AVIO_DATA_MARKER_UNKNOWN (to avoid needlessly
@ -407,7 +416,11 @@ AVIOContext *avio_alloc_context(
int write_flag,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
#if FF_API_AVIO_WRITE_NONCONST
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
#else
int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size),
#endif
int64_t (*seek)(void *opaque, int64_t offset, int whence));
/**

4
libavformat/avio_internal.h
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@ -89,7 +89,11 @@ void ffio_init_context(FFIOContext *s,
int write_flag,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
#if FF_API_AVIO_WRITE_NONCONST
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
#else
int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size),
#endif
int64_t (*seek)(void *opaque, int64_t offset, int whence));
/**

28
libavformat/aviobuf.c
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@ -84,7 +84,11 @@ void ffio_init_context(FFIOContext *ctx,
int write_flag,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
#if FF_API_AVIO_WRITE_NONCONST
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
#else
int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size),
#endif
int64_t (*seek)(void *opaque, int64_t offset, int whence))
{
AVIOContext *const s = &ctx->pub;
@ -143,7 +147,11 @@ AVIOContext *avio_alloc_context(
int write_flag,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
#if FF_API_AVIO_WRITE_NONCONST
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
#else
int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size),
#endif
int64_t (*seek)(void *opaque, int64_t offset, int whence))
{
FFIOContext *s = av_malloc(sizeof(*s));
@ -165,12 +173,20 @@ static void writeout(AVIOContext *s, const uint8_t *data, int len)
if (!s->error) {
int ret = 0;
if (s->write_data_type)
#if FF_API_AVIO_WRITE_NONCONST
ret = s->write_data_type(s->opaque, (uint8_t *)data,
#else
ret = s->write_data_type(s->opaque, data,
#endif
len,
ctx->current_type,
ctx->last_time);
else if (s->write_packet)
#if FF_API_AVIO_WRITE_NONCONST
ret = s->write_packet(s->opaque, (uint8_t *)data, len);
#else
ret = s->write_packet(s->opaque, data, len);
#endif
if (ret < 0) {
s->error = ret;
} else {
@ -1396,7 +1412,11 @@ typedef struct DynBuffer {
uint8_t io_buffer[1];
} DynBuffer;
#if FF_API_AVIO_WRITE_NONCONST
static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
#else
static int dyn_buf_write(void *opaque, const uint8_t *buf, int buf_size)
#endif
{
DynBuffer *d = opaque;
unsigned new_size;
@ -1428,7 +1448,11 @@ static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
return buf_size;
}
#if FF_API_AVIO_WRITE_NONCONST
static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size)
#else
static int dyn_packet_buf_write(void *opaque, const uint8_t *buf, int buf_size)
#endif
{
unsigned char buf1[4];
int ret;
@ -1565,7 +1589,11 @@ void ffio_free_dyn_buf(AVIOContext **s)
avio_context_free(s);
}
#if FF_API_AVIO_WRITE_NONCONST
static int null_buf_write(void *opaque, uint8_t *buf, int buf_size)
#else
static int null_buf_write(void *opaque, const uint8_t *buf, int buf_size)
#endif
{
DynBuffer *d = opaque;

4
libavformat/hdsenc.c
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@ -112,7 +112,11 @@ static int parse_header(OutputStream *os, const uint8_t *buf, int buf_size)
return 0;
}
#if FF_API_AVIO_WRITE_NONCONST
static int hds_write(void *opaque, uint8_t *buf, int buf_size)
#else
static int hds_write(void *opaque, const uint8_t *buf, int buf_size)
#endif
{
OutputStream *os = opaque;
if (os->out) {

4
libavformat/smoothstreamingenc.c
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@ -75,7 +75,11 @@ typedef struct SmoothStreamingContext {
int nb_fragments;
} SmoothStreamingContext;
#if FF_API_AVIO_WRITE_NONCONST
static int ism_write(void *opaque, uint8_t *buf, int buf_size)
#else
static int ism_write(void *opaque, const uint8_t *buf, int buf_size)
#endif
{
OutputStream *os = opaque;
if (os->out)

8
libavformat/url.h
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@ -194,7 +194,11 @@ static inline int ffurl_read(URLContext *h, uint8_t *buf, int size)
*/
int ffurl_read_complete(URLContext *h, unsigned char *buf, int size);
#if FF_API_AVIO_WRITE_NONCONST
int ffurl_write2(void *urlcontext, uint8_t *buf, int size);
#else
int ffurl_write2(void *urlcontext, const uint8_t *buf, int size);
#endif
/**
* Write size bytes from buf to the resource accessed by h.
*
@ -203,7 +207,11 @@ int ffurl_write2(void *urlcontext, uint8_t *buf, int size);
*/
static inline int ffurl_write(URLContext *h, const uint8_t *buf, int size)
{
#if FF_API_AVIO_WRITE_NONCONST
return ffurl_write2(h, (uint8_t*)buf, size);
#else
return ffurl_write2(h, buf, size);
#endif
}
int64_t ffurl_seek2(void *urlcontext, int64_t pos, int whence);

2
libavformat/version.h
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@ -31,7 +31,7 @@
#include "version_major.h"
#define LIBAVFORMAT_VERSION_MINOR 11
#define LIBAVFORMAT_VERSION_MINOR 12
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \

1
libavformat/version_major.h
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@ -45,6 +45,7 @@
#define FF_API_GET_END_PTS (LIBAVFORMAT_VERSION_MAJOR < 61)
#define FF_API_AVIODIRCONTEXT (LIBAVFORMAT_VERSION_MAJOR < 61)
#define FF_API_AVFORMAT_IO_CLOSE (LIBAVFORMAT_VERSION_MAJOR < 61)
#define FF_API_AVIO_WRITE_NONCONST (LIBAVFORMAT_VERSION_MAJOR < 61)
#define FF_API_R_FRAME_RATE 1