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-rw-r--r--src/decoder/faad_plugin.c307
1 files changed, 155 insertions, 152 deletions
diff --git a/src/decoder/faad_plugin.c b/src/decoder/faad_plugin.c
index ee05db4d5..c04b9292c 100644
--- a/src/decoder/faad_plugin.c
+++ b/src/decoder/faad_plugin.c
@@ -17,6 +17,7 @@
*/
#include "../decoder_api.h"
+#include "decoder_buffer.h"
#include "config.h"
#define AAC_MAX_CHANNELS 6
@@ -29,60 +30,6 @@
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "faad"
-/* all code here is either based on or copied from FAAD2's frontend code */
-struct faad_buffer {
- struct decoder *decoder;
- struct input_stream *is;
- size_t length;
- size_t consumed;
- unsigned char data[FAAD_MIN_STREAMSIZE * AAC_MAX_CHANNELS];
-};
-
-static void
-faad_buffer_shift(struct faad_buffer *b, size_t length)
-{
- assert(length >= b->consumed);
- assert(length <= b->consumed + b->length);
-
- memmove(b->data, b->data + length,
- b->consumed + b->length - length);
-
- length -= b->consumed;
- b->consumed = 0;
- b->length -= length;
-}
-
-static void
-faad_buffer_fill(struct faad_buffer *b)
-{
- size_t rest, bread;
-
- if (b->consumed > 0)
- faad_buffer_shift(b, b->consumed);
-
- rest = sizeof(b->data) - b->length;
- if (rest == 0)
- /* buffer already full */
- return;
-
- bread = decoder_read(b->decoder, b->is,
- b->data + b->length, rest);
- b->length += bread;
-
- if ((b->length > 3 && memcmp(b->data, "TAG", 3) == 0) ||
- (b->length > 11 &&
- memcmp(b->data, "LYRICSBEGIN", 11) == 0) ||
- (b->length > 8 && memcmp(b->data, "APETAGEX", 8) == 0))
- b->length = 0;
-}
-
-static void
-faad_buffer_consume(struct faad_buffer *b, size_t bytes)
-{
- b->consumed = bytes;
- b->length -= bytes;
-}
-
static const unsigned adts_sample_rates[] =
{ 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
16000, 12000, 11025, 8000, 7350, 0, 0, 0
@@ -93,17 +40,15 @@ static const unsigned adts_sample_rates[] =
* length. Returns 0 if it is not a frame.
*/
static size_t
-adts_check_frame(struct faad_buffer *b)
+adts_check_frame(const unsigned char *data)
{
- assert(b->length >= 8);
-
/* check syncword */
- if (!((b->data[0] == 0xFF) && ((b->data[1] & 0xF6) == 0xF0)))
+ if (!((data[0] == 0xFF) && ((data[1] & 0xF6) == 0xF0)))
return 0;
- return (((unsigned int)b->data[3] & 0x3) << 11) |
- (((unsigned int)b->data[4]) << 3) |
- (b->data[5] >> 5);
+ return (((unsigned int)data[3] & 0x3) << 11) |
+ (((unsigned int)data[4]) << 3) |
+ (data[5] >> 5);
}
/**
@@ -111,40 +56,71 @@ adts_check_frame(struct faad_buffer *b)
* found or if not enough data is available.
*/
static size_t
-adts_find_frame(struct faad_buffer *b)
+adts_find_frame(struct decoder_buffer *buffer)
{
- const unsigned char *p;
- size_t frame_length;
+ const unsigned char *data, *p;
+ size_t length, frame_length;
+ bool ret;
- faad_buffer_fill(b);
+ while (true) {
+ data = decoder_buffer_read(buffer, &length);
+ if (data == NULL || length < 8) {
+ /* not enough data yet */
+ ret = decoder_buffer_fill(buffer);
+ if (!ret)
+ /* failed */
+ return 0;
- while ((p = memchr(b->data, 0xff, b->length)) != NULL) {
- /* discard data before 0xff */
- if (p > b->data)
- faad_buffer_shift(b, p - b->data);
+ continue;
+ }
- if (b->length < 8)
- /* not enough data yet */
- return 0;
+ /* find the 0xff marker */
+ p = memchr(data, 0xff, length);
+ if (p == NULL) {
+ /* no marker - discard the buffer */
+ decoder_buffer_consume(buffer, length);
+ continue;
+ }
+
+ if (p > data) {
+ /* discard data before 0xff */
+ decoder_buffer_consume(buffer, p - data);
+ continue;
+ }
/* is it a frame? */
- frame_length = adts_check_frame(b);
- if (frame_length > 0)
- /* yes, it is */
- return frame_length;
-
- /* it's just some random 0xff byte; discard and and
- continue searching */
- faad_buffer_shift(b, 1);
- }
+ frame_length = adts_check_frame(data);
+ if (frame_length == 0) {
+ /* it's just some random 0xff byte; discard it
+ and continue searching */
+ decoder_buffer_consume(buffer, 1);
+ continue;
+ }
+
+ if (length < frame_length) {
+ /* available buffer size is smaller than the
+ frame will be - attempt to read more
+ data */
+ ret = decoder_buffer_fill(buffer);
+ if (!ret) {
+ /* not enough data; discard this frame
+ to prevent a possible buffer
+ overflow */
+ data = decoder_buffer_read(buffer, &length);
+ if (data != NULL)
+ decoder_buffer_consume(buffer, length);
+ }
+
+ continue;
+ }
- /* nothing at all; discard the whole buffer */
- faad_buffer_shift(b, b->length);
- return 0;
+ /* found a full frame! */
+ return frame_length;
+ }
}
static float
-adts_song_duration(struct faad_buffer *b)
+adts_song_duration(struct decoder_buffer *buffer)
{
unsigned int frames, frame_length;
unsigned sample_rate = 0;
@@ -152,18 +128,23 @@ adts_song_duration(struct faad_buffer *b)
/* Read all frames to ensure correct time and bitrate */
for (frames = 0;; frames++) {
- frame_length = adts_find_frame(b);
- if (frame_length > 0) {
- if (frames == 0) {
- sample_rate = adts_sample_rates[(b->data[2] & 0x3c) >> 2];
- }
+ frame_length = adts_find_frame(buffer);
+ if (frame_length == 0)
+ break;
- if (frame_length > b->length)
- break;
- faad_buffer_consume(b, frame_length);
- } else
- break;
+ if (frames == 0) {
+ const unsigned char *data;
+ size_t buffer_length;
+
+ data = decoder_buffer_read(buffer, &buffer_length);
+ assert(data != NULL);
+ assert(frame_length <= buffer_length);
+
+ sample_rate = adts_sample_rates[(data[2] & 0x3c) >> 2];
+ }
+
+ decoder_buffer_consume(buffer, frame_length);
}
frames_per_second = (float)sample_rate / 1024.0;
@@ -173,61 +154,60 @@ adts_song_duration(struct faad_buffer *b)
return (float)frames / frames_per_second;
}
-static void
-faad_buffer_init(struct faad_buffer *buffer, struct decoder *decoder,
- struct input_stream *is)
-{
- memset(buffer, 0, sizeof(*buffer));
-
- buffer->decoder = decoder;
- buffer->is = is;
-}
-
static float
-faad_song_duration(struct faad_buffer *b)
+faad_song_duration(struct decoder_buffer *buffer, struct input_stream *is)
{
size_t fileread;
size_t tagsize;
+ const unsigned char *data;
+ size_t length;
- fileread = b->is->size >= 0 ? b->is->size : 0;
+ fileread = is->size >= 0 ? is->size : 0;
- faad_buffer_fill(b);
+ decoder_buffer_fill(buffer);
+ data = decoder_buffer_read(buffer, &length);
+ if (data == NULL)
+ return -1;
tagsize = 0;
- if (b->length >= 10 && !memcmp(b->data, "ID3", 3)) {
- tagsize = (b->data[6] << 21) | (b->data[7] << 14) |
- (b->data[8] << 7) | (b->data[9] << 0);
+ if (length >= 10 && !memcmp(data, "ID3", 3)) {
+ tagsize = (data[6] << 21) | (data[7] << 14) |
+ (data[8] << 7) | (data[9] << 0);
tagsize += 10;
- faad_buffer_consume(b, tagsize);
- faad_buffer_fill(b);
+
+ decoder_buffer_consume(buffer, tagsize);
+ decoder_buffer_fill(buffer);
+ data = decoder_buffer_read(buffer, &length);
+ if (data == NULL)
+ return -1;
}
- if (b->is->seekable && b->length >= 2 &&
- (b->data[0] == 0xFF) && ((b->data[1] & 0xF6) == 0xF0)) {
- float length = adts_song_duration(b);
- input_stream_seek(b->is, tagsize, SEEK_SET);
+ if (is->seekable && length >= 2 &&
+ data[0] == 0xFF && ((data[1] & 0xF6) == 0xF0)) {
+ float song_length = adts_song_duration(buffer);
- b->length = 0;
- b->consumed = 0;
+ input_stream_seek(is, tagsize, SEEK_SET);
- faad_buffer_fill(b);
+ data = decoder_buffer_read(buffer, &length);
+ if (data != NULL)
+ decoder_buffer_consume(buffer, length);
+ decoder_buffer_fill(buffer);
- return length;
- } else if (b->length >= 5 && memcmp(b->data, "ADIF", 4) == 0) {
+ return song_length;
+ } else if (length >= 5 && memcmp(data, "ADIF", 4) == 0) {
unsigned bit_rate;
- size_t skip_size = (b->data[4] & 0x80) ? 9 : 0;
+ size_t skip_size = (data[4] & 0x80) ? 9 : 0;
-
- if (8 + skip_size > b->length)
+ if (8 + skip_size > length)
/* not enough data yet; skip parsing this
header */
return -1;
- bit_rate = ((unsigned)(b->data[4 + skip_size] & 0x0F) << 19) |
- ((unsigned)b->data[5 + skip_size] << 11) |
- ((unsigned)b->data[6 + skip_size] << 3) |
- ((unsigned)b->data[7 + skip_size] & 0xE0);
+ bit_rate = ((data[4 + skip_size] & 0x0F) << 19) |
+ (data[5 + skip_size] << 11) |
+ (data[6 + skip_size] << 3) |
+ (data[7 + skip_size] & 0xE0);
if (fileread != 0 && bit_rate != 0)
return fileread * 8.0 / bit_rate;
@@ -242,9 +222,15 @@ faad_song_duration(struct faad_buffer *b)
* inconsistencies in libfaad.
*/
static bool
-faad_decoder_init(faacDecHandle decoder, struct faad_buffer *buffer,
+faad_decoder_init(faacDecHandle decoder, struct decoder_buffer *buffer,
uint32_t *sample_rate, uint8_t *channels)
{
+ union {
+ /* deconst hack for libfaad */
+ const void *in;
+ void *out;
+ } u;
+ size_t length;
int32_t nbytes;
#ifdef HAVE_FAAD_LONG
/* neaacdec.h declares all arguments as "unsigned long", but
@@ -255,15 +241,19 @@ faad_decoder_init(faacDecHandle decoder, struct faad_buffer *buffer,
uint32_t *sample_rate_r = sample_rate;
#endif
- nbytes = faacDecInit(decoder, buffer->data,
+ u.in = decoder_buffer_read(buffer, &length);
+ if (u.in == NULL)
+ return false;
+
+ nbytes = faacDecInit(decoder, u.out,
#ifdef HAVE_FAAD_BUFLEN_FUNCS
- buffer->length,
+ length,
#endif
sample_rate_r, channels);
if (nbytes < 0)
return false;
- faad_buffer_consume(buffer, nbytes);
+ decoder_buffer_consume(buffer, nbytes);
return true;
}
@@ -272,15 +262,25 @@ faad_decoder_init(faacDecHandle decoder, struct faad_buffer *buffer,
* inconsistencies in libfaad.
*/
static const void *
-faad_decoder_decode(faacDecHandle decoder, struct faad_buffer *buffer,
+faad_decoder_decode(faacDecHandle decoder, struct decoder_buffer *buffer,
NeAACDecFrameInfo *frame_info)
{
+ union {
+ /* deconst hack for libfaad */
+ const void *in;
+ void *out;
+ } u;
+ size_t length;
void *result;
+ u.in = decoder_buffer_read(buffer, &length);
+ if (u.in == NULL)
+ return false;
+
result = faacDecDecode(decoder, frame_info,
- buffer->data
+ u.out
#ifdef HAVE_FAAD_BUFLEN_FUNCS
- , buffer->length
+ , length
#endif
);
@@ -290,7 +290,7 @@ faad_decoder_decode(faacDecHandle decoder, struct faad_buffer *buffer,
static float
faad_get_file_time_float(const char *file)
{
- struct faad_buffer buffer;
+ struct decoder_buffer *buffer;
float length;
faacDecHandle decoder;
faacDecConfigurationPtr config;
@@ -301,8 +301,9 @@ faad_get_file_time_float(const char *file)
if (!input_stream_open(&is, file))
return -1;
- faad_buffer_init(&buffer, NULL, &is);
- length = faad_song_duration(&buffer);
+ buffer = decoder_buffer_new(NULL, &is,
+ FAAD_MIN_STREAMSIZE * AAC_MAX_CHANNELS);
+ length = faad_song_duration(buffer, &is);
if (length < 0) {
bool ret;
@@ -313,9 +314,9 @@ faad_get_file_time_float(const char *file)
config->outputFormat = FAAD_FMT_16BIT;
faacDecSetConfiguration(decoder, config);
- faad_buffer_fill(&buffer);
+ decoder_buffer_fill(buffer);
- ret = faad_decoder_init(decoder, &buffer,
+ ret = faad_decoder_init(decoder, buffer,
&sample_rate, &channels);
if (ret && sample_rate > 0 && channels > 0)
length = 0;
@@ -323,6 +324,7 @@ faad_get_file_time_float(const char *file)
faacDecClose(decoder);
}
+ decoder_buffer_free(buffer);
input_stream_close(&is);
return length;
@@ -355,12 +357,13 @@ faad_stream_decode(struct decoder *mpd_decoder, struct input_stream *is)
const void *decoded;
size_t decoded_length;
uint16_t bit_rate = 0;
- struct faad_buffer buffer;
+ struct decoder_buffer *buffer;
bool initialized = false;
enum decoder_command cmd;
- faad_buffer_init(&buffer, mpd_decoder, is);
- total_time = faad_song_duration(&buffer);
+ buffer = decoder_buffer_new(mpd_decoder, is,
+ FAAD_MIN_STREAMSIZE * AAC_MAX_CHANNELS);
+ total_time = faad_song_duration(buffer, is);
decoder = faacDecOpen();
@@ -374,14 +377,14 @@ faad_stream_decode(struct decoder *mpd_decoder, struct input_stream *is)
#endif
faacDecSetConfiguration(decoder, config);
- while (buffer.length < sizeof(buffer.data) &&
- !input_stream_eof(buffer.is) &&
+ while (!decoder_buffer_is_full(buffer) &&
+ !input_stream_eof(is) &&
decoder_get_command(mpd_decoder) == DECODE_COMMAND_NONE) {
- adts_find_frame(&buffer);
- faad_buffer_fill(&buffer);
+ adts_find_frame(buffer);
+ decoder_buffer_fill(buffer);
}
- ret = faad_decoder_init(decoder, &buffer,
+ ret = faad_decoder_init(decoder, buffer,
&sample_rate, &channels);
if (!ret) {
g_warning("Error not a AAC stream.\n");
@@ -392,11 +395,11 @@ faad_stream_decode(struct decoder *mpd_decoder, struct input_stream *is)
file_time = 0.0;
do {
- size_t frame_size = adts_find_frame(&buffer);
+ size_t frame_size = adts_find_frame(buffer);
if (frame_size == 0)
break;
- decoded = faad_decoder_decode(decoder, &buffer, &frame_info);
+ decoded = faad_decoder_decode(decoder, buffer, &frame_info);
if (frame_info.error > 0) {
g_warning("error decoding AAC stream: %s\n",
@@ -424,7 +427,7 @@ faad_stream_decode(struct decoder *mpd_decoder, struct input_stream *is)
initialized = true;
}
- faad_buffer_consume(&buffer, frame_info.bytesconsumed);
+ decoder_buffer_consume(buffer, frame_info.bytesconsumed);
sample_count = (unsigned long)frame_info.samples;
if (sample_count > 0) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 15:06:37 +0000