Merge remote-tracking branch 'qatar/master'

* qatar/master:
  ARM: ac3: update ff_ac3_extract_exponents_neon per 8b7b2d6
  ARM: NEON optimised vector_clip_int32()
  swscale: disable full_chroma_int when converting to non-24/32bpp RGB.
  suggest to use av_get_bytes_per_sample() in av_get_bits_per_sample_format() doxy
  ffmpeg: use av_get_bytes_per_sample() in place of av_get_bits_per_sample_fmt()
  put_bits: remove ALT_BITSTREAM_WRITER
  put_bits: always use intreadwrite.h macros
  libavformat: Add an example how to use the metadata API
  doxygen: Prefer member groups over grouping into modules
  doxygen: be more permissive when searching for API examples
  avformat: doxify the Metadata API
  lavf: restore old behavior for custom AVIOContex with an AVFMT_NOFILE format.
  lavf: use the correct pointer in av_open_input_stream().
  avidec: infer absolute vs relative index from first packet

Conflicts:
	libavformat/Makefile
	libavformat/avidec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 3 insertions, 114 deletions

diff --git a/libavcodec/put_bits.h b/libavcodec/put_bits.h
index 79016912d5..a3fc5f16f1 100644
--- a/libavcodec/put_bits.h
+++ b/libavcodec/put_bits.h
@@ -36,19 +36,10 @@
 #include "mathops.h"
 #include "config.h"
 
-//#define ALT_BITSTREAM_WRITER
-//#define ALIGNED_BITSTREAM_WRITER
-
-/* buf and buf_end must be present and used by every alternative writer. */
 typedef struct PutBitContext {
-#ifdef ALT_BITSTREAM_WRITER
-    uint8_t *buf, *buf_end;
-    int index;
-#else
     uint32_t bit_buf;
     int bit_left;
     uint8_t *buf, *buf_ptr, *buf_end;
-#endif
     int size_in_bits;
 } PutBitContext;
 
@@ -68,15 +59,9 @@ static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_s
     s->size_in_bits= 8*buffer_size;
     s->buf = buffer;
     s->buf_end = s->buf + buffer_size;
-#ifdef ALT_BITSTREAM_WRITER
-    s->index=0;
-    ((uint32_t*)(s->buf))[0]=0;
-//    memset(buffer, 0, buffer_size);
-#else
     s->buf_ptr = s->buf;
     s->bit_left=32;
     s->bit_buf=0;
-#endif
 }
 
 /**
@@ -84,11 +69,7 @@ static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_s
  */
 static inline int put_bits_count(PutBitContext *s)
 {
-#ifdef ALT_BITSTREAM_WRITER
-    return s->index;
-#else
     return (s->buf_ptr - s->buf) * 8 + 32 - s->bit_left;
-#endif
 }
 
 /**
@@ -96,9 +77,6 @@ static inline int put_bits_count(PutBitContext *s)
  */
 static inline void flush_put_bits(PutBitContext *s)
 {
-#ifdef ALT_BITSTREAM_WRITER
-    align_put_bits(s);
-#else
 #ifndef BITSTREAM_WRITER_LE
     s->bit_buf<<= s->bit_left;
 #endif
@@ -115,10 +93,9 @@ static inline void flush_put_bits(PutBitContext *s)
     }
     s->bit_left=32;
     s->bit_buf=0;
-#endif
 }
 
-#if defined(ALT_BITSTREAM_WRITER) || defined(BITSTREAM_WRITER_LE)
+#ifdef BITSTREAM_WRITER_LE
 #define align_put_bits align_put_bits_unsupported_here
 #define ff_put_string ff_put_string_unsupported_here
 #define ff_copy_bits ff_copy_bits_unsupported_here
@@ -148,7 +125,6 @@ void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length);
  * Use put_bits32 to write 32 bits.
  */
 static inline void put_bits(PutBitContext *s, int n, unsigned int value)
-#ifndef ALT_BITSTREAM_WRITER
 {
     unsigned int bit_buf;
     int bit_left;
@@ -164,12 +140,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 #ifdef BITSTREAM_WRITER_LE
     bit_buf |= value << (32 - bit_left);
     if (n >= bit_left) {
-#if !HAVE_FAST_UNALIGNED
-        if (3 & (intptr_t) s->buf_ptr) {
-            AV_WL32(s->buf_ptr, bit_buf);
-        } else
-#endif
-        *(uint32_t *)s->buf_ptr = av_le2ne32(bit_buf);
+        AV_WL32(s->buf_ptr, bit_buf);
         s->buf_ptr+=4;
         bit_buf = (bit_left==32)?0:value >> bit_left;
         bit_left+=32;
@@ -182,12 +153,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
     } else {
         bit_buf<<=bit_left;
         bit_buf |= value >> (n - bit_left);
-#if !HAVE_FAST_UNALIGNED
-        if (3 & (intptr_t) s->buf_ptr) {
-            AV_WB32(s->buf_ptr, bit_buf);
-        } else
-#endif
-        *(uint32_t *)s->buf_ptr = av_be2ne32(bit_buf);
+        AV_WB32(s->buf_ptr, bit_buf);
         //printf("bitbuf = %08x\n", bit_buf);
         s->buf_ptr+=4;
         bit_left+=32 - n;
@@ -198,70 +164,6 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
     s->bit_buf = bit_buf;
     s->bit_left = bit_left;
 }
-#else  /* ALT_BITSTREAM_WRITER defined */
-{
-#    ifdef ALIGNED_BITSTREAM_WRITER
-#        if ARCH_X86
-    __asm__ volatile(
-        "movl %0, %%ecx                 \n\t"
-        "xorl %%eax, %%eax              \n\t"
-        "shrdl %%cl, %1, %%eax          \n\t"
-        "shrl %%cl, %1                  \n\t"
-        "movl %0, %%ecx                 \n\t"
-        "shrl $3, %%ecx                 \n\t"
-        "andl $0xFFFFFFFC, %%ecx        \n\t"
-        "bswapl %1                      \n\t"
-        "orl %1, (%2, %%ecx)            \n\t"
-        "bswapl %%eax                   \n\t"
-        "addl %3, %0                    \n\t"
-        "movl %%eax, 4(%2, %%ecx)       \n\t"
-        : "=&r" (s->index), "=&r" (value)
-        : "r" (s->buf), "r" (n), "0" (s->index), "1" (value<<(-n))
-        : "%eax", "%ecx"
-    );
-#        else
-    int index= s->index;
-    uint32_t *ptr= ((uint32_t *)s->buf)+(index>>5);
-
-    value<<= 32-n;
-
-    ptr[0] |= av_be2ne32(value>>(index&31));
-    ptr[1]  = av_be2ne32(value<<(32-(index&31)));
-//if(n>24) printf("%d %d\n", n, value);
-    index+= n;
-    s->index= index;
-#        endif
-#    else //ALIGNED_BITSTREAM_WRITER
-#        if ARCH_X86
-    __asm__ volatile(
-        "movl $7, %%ecx                 \n\t"
-        "andl %0, %%ecx                 \n\t"
-        "addl %3, %%ecx                 \n\t"
-        "negl %%ecx                     \n\t"
-        "shll %%cl, %1                  \n\t"
-        "bswapl %1                      \n\t"
-        "movl %0, %%ecx                 \n\t"
-        "shrl $3, %%ecx                 \n\t"
-        "orl %1, (%%ecx, %2)            \n\t"
-        "addl %3, %0                    \n\t"
-        "movl $0, 4(%%ecx, %2)          \n\t"
-        : "=&r" (s->index), "=&r" (value)
-        : "r" (s->buf), "r" (n), "0" (s->index), "1" (value)
-        : "%ecx"
-    );
-#        else
-    int index= s->index;
-    uint32_t *ptr= (uint32_t*)(((uint8_t *)s->buf)+(index>>3));
-
-    ptr[0] |= av_be2ne32(value<<(32-n-(index&7) ));
-    ptr[1] = 0;
-//if(n>24) printf("%d %d\n", n, value);
-    index+= n;
-    s->index= index;
-#        endif
-#    endif //!ALIGNED_BITSTREAM_WRITER
-}
-#endif
 
 static inline void put_sbits(PutBitContext *pb, int n, int32_t value)
 {
@@ -292,11 +194,7 @@ static void av_unused put_bits32(PutBitContext *s, uint32_t value)
  */
 static inline uint8_t* put_bits_ptr(PutBitContext *s)
 {
-#ifdef ALT_BITSTREAM_WRITER
-        return s->buf + (s->index>>3);
-#else
         return s->buf_ptr;
-#endif
 }
 
 /**
@@ -306,13 +204,8 @@ static inline uint8_t* put_bits_ptr(PutBitContext *s)
 static inline void skip_put_bytes(PutBitContext *s, int n)
 {
         assert((put_bits_count(s)&7)==0);
-#ifdef ALT_BITSTREAM_WRITER
-        FIXME may need some cleaning of the buffer
-        s->index += n<<3;
-#else
         assert(s->bit_left==32);
         s->buf_ptr += n;
-#endif
 }
 
 /**
@@ -322,13 +215,9 @@ static inline void skip_put_bytes(PutBitContext *s, int n)
  */
 static inline void skip_put_bits(PutBitContext *s, int n)
 {
-#ifdef ALT_BITSTREAM_WRITER
-    s->index += n;
-#else
     s->bit_left -= n;
     s->buf_ptr-= 4*(s->bit_left>>5);
     s->bit_left &= 31;
-#endif
 }
 
 /**